Tech
APIs, the cloud, AI — the tech you use daily, finally explained.
Adware
It's an uninvited guest that shows up pretending to hand you a free gift, then shoves a screenful of ad flyers in your face.
Agile
Instead of writing the perfect cookbook before you ever turn on the stove, you cook, taste, and add a little seasoning at a time.
AI Agents
It's not an encyclopedia that just answers questions. It's a super-assistant that, once you give it a goal, books the flight and even writes the report for you.
AI and Machine Learning
Instead of writing down every rule by hand, it is like having a student solve thousands of practice exams so they discover the formula on their own.
AI Hallucination
It's like a student who doesn't know the answer on a test, but writes a confident, convincing, completely made-up response anyway.
Airplane Mode
A master switch that covers your phone's ears and mouth, instantly cutting off all outgoing radio signals.
Algorithm
A step-by-step recipe you follow to cook a dish perfectly without failing.
Algorithmic Recommendation Feeds
It's like a personal buffet chef who watches which plates you clean, which ones you leave half full, and which stations you linger at, then keeps bringing out the next dish that fits your taste perfectly.
Alpha Channel
Like a clear sheet of cellophane laid behind a picture, it's the fourth data value that tells you how see-through an object on screen is.
Always-On Display (AOD)
Like an apartment building at night with just a few windows lit, it keeps only a tiny part of the screen on.
Ansim Beonho: Korea's 050 Virtual Phone Number
Like a paper mask you wear for a moment at a festival instead of showing your real face, it is a disposable virtual number that hides your real phone number.
Anti-Aliasing
An optical trick that smooths jagged, staircase-like edges on a square grid by filling the gaps with blended intermediate colors.
Anti-Reflective Coating
Just as two colliding water ripples can cancel each other out into a flat surface when their peaks and troughs misalign, this transparent film makes bouncing light waves destroy each other—slashing glare and letting light pass freely through.
API
It works like ordering at a restaurant: you never walk into the kitchen. You read the menu, tell the server what you want, and the food arrives.
App Cache Data
It's like leaving the book you read all the time on a corner of your desk, instead of putting it back on the bookshelf every single time.
Array
It's like a weekly pill organizer with numbered compartments: same-size rooms lined up side by side, holding things in numbered order.
Artificial General Intelligence
It's not a single-purpose tool that only plays Go or only translates. It's a Swiss Army knife of an intelligence that can teach itself to do just about anything a person can.
async await
It's like getting a buzzer at a food court: you sit down and relax, and only when it buzzes do you move on to the next step of your order.
Asynchronous Processing
It is like taking a buzzer pager at a cafe and relaxing at your table, only picking up your coffee when the pager vibrates.
Background App Refresh
It's like opening your front door in the morning and finding the newspaper already there. Your apps get the latest info delivered before you open them.
Backlight Bleed
Just like morning sunlight leaking around the edges of blackout curtains, light seeps out from the borders of your screen.
Backward Compatibility
It's like buying a brand-new game console and finding that the old game discs in your drawer still play perfectly.
Bandwidth
It's the width of a water pipe, which decides how much water can gush out at once.
Bandwidth Throttling
It is like turning a faucet valve down to deliberately reduce the stream of water.
Batch Processing
It's like collecting dirty laundry in a hamper and running the washing machine once, instead of running it every time something gets dirty.
Battery Charge Cycle
It is like an odometer counting how many times your battery has done a full tank's worth of work.
Battery Health Management
Stretch a rubber band all the way out and let it snap back again and again, and it soon goes loose. A battery lasts longer when you don't fill it to the brim or run it to the bottom.
Battery Management System
It's an electronic brain that watches hundreds or even thousands of battery cells one by one, preventing overcharging and overheating.
Battery Memory Effect
It's like topping off a half-finished drink over and over until the gunk at the bottom hardens, and you can only use the top part of the cup.
Battery Swelling
Just like an airtight food container puffs up from trapped fermentation gases, a device's battery bloats into a pillow when gas builds up inside.
Battery Thermal Runaway
It's a domino effect where a tiny spark pours its own fuel, fans its own flames, and blows up into a huge fire in no time.
Benchmark Dataset
It's like a standardized exam—like the SAT—or an identical running track where every competitor is tested under the exact same conditions.
Bitcoin
Instead of a bank vault, everyone in the village holds an identical copy of the same household ledger, and that's how transactions get proven. That's a digital currency.
Bitmap
It's a mosaic made by fitting thousands of tiny colored tiles tightly together.
Bitrate
Just like how much paint you apply to a canvas, bitrate is the amount of data poured into every second of video.
Blockchain
A shared ledger where everyone in town holds an identical copy. If one person secretly alters their own book, no one else accepts it, making the forgery useless.
Bloom Effect
It's like looking at a streetlight on a foggy night: the light seems to spill out around it in a soft, hazy glow.
Blue Light Filter
Like turning off a harsh fluorescent ceiling light late at night and switching to a warm, dim lamp so your brain doesn't mistake midnight for noon.
Bluetooth
An invisible wireless tether that lets nearby devices hold hands through quiet whispers only heard in the same room.
Bluetooth LE
An ultra-low-power wireless messenger that naps all day, wakes up for a split second to drop off a quick note, and goes right back to sleep.
Bounding Box
It's like an AI circling an item in a busy photo with a red marker and saying, 'Look right here!'
Brute Force Attack
It is like forgetting the combination to your bike lock and testing every single code from 0000 to 9999 until it clicks open.
Bypass Charging
Instead of running a pump tirelessly to top off a water tank with leftover water, it is like turning off the tank valve and drawing water directly from the main line.
Cache
It's a small bookstand on your desk that lets you grab the books you read most without walking to the library in the next room.
Caesar Cipher
It's a secret note where you slide the whole alphabet a few spots over, so only people who know the rule can read it.
Capacitive Touchscreen
Like an invisible electric net beneath the glass that detects in a flash where a tiny bit of electricity leaks into your fingertip.
CAPTCHA
It's like a goofy riddle at an amusement park gate, used to tell real people apart from robots in disguise.
Captive Portal
When you join hotel or cafe Wi-Fi, it's the "internet turnstile" that blocks your way first with a terms-of-service or login screen before you can go online.
CDN
It is like picking up a package from a neighborhood locker instead of waiting for it to ship from a factory across the ocean.
Cel Shading
It's like tracing a 3D toy with a bold black pen and painting it in flat, separate patches of color, so it turns into a cartoon hero.
Character Encoding
It's a translation notebook that gives every letter its own number tag, so people can pass text to a computer that only knows 0s and 1s.
Chroma Key
It's a technique that works like a magic eraser: it wipes out just one color from a picture in your sketchbook and makes that spot transparent.
CI/CD
It's like making a group class newspaper where a checker runs by itself every time you combine articles, and anything that passes goes straight up on the bulletin board.
Cleanroom
A high-tech fortress designed to purge every airborne speck of dust, protecting microscopic manufacturing lines where a single particle acts like a catastrophic meteor.
Clipping Mask
It's like laying a big photo behind a round picture frame, so everything sticking out past the frame quietly disappears.
Clock Speed
Just like a metronome setting the tempo for musicians, clock speed measures how many rhythmic ticks a computer's brain cycles through each second to process information.
Cloud Backup
It's like keeping a copy of your precious diary in a bank vault, so even if your house burns down, your memories are safe.
Cloud Computing
Just like plugging into the electric grid instead of running a generator in your yard, you rent computing power over the internet only when you need it.
Code Page
It's a regional translation cipher chart that matches each country's language to numbers.
Code Review
It's like showing something you wrote to a friend first and asking them to catch awkward sentences and typos. It's proofreading for code.
Codec
It's a magic compressor, like squeezing a bulky winter comforter into a vacuum storage bag, then opening the zipper later to bring it back to its fluffy self.
Coil Whine
It's like water rushing hard through a pipe: the whole pipe shakes a little and lets out a thin, high-pitched whine.
Collaborative Filtering
It is like peeking at the favorite restaurant list of a friend who shares your exact taste in food.
Color Temperature
Just like iron glowing in a forge shifts from dull red to yellow and brilliant white, color temperature is a numerical scale measuring how warm or cool a light looks.
Compiler
A compiler is like a translator who takes a whole cookbook written in a foreign language and prints a brand-new English edition of it.
Computer Vision
It captures the world through the artificial eyes of a camera and uses a software brain to understand what it sees.
Computer Worm
A self-multiplying program that creeps through cracks in your network, replicating and spreading entirely on its own without needing anyone to click.
Connection Timeout
Just like hanging up after letting the phone ring for a set number of times without an answer, it is the maximum time your device waits for a server to open the door.
Constant Bitrate (CBR)
It's a faucet that pours out exactly the same amount of water every second, whether the screen is frozen or exploding with action.
Content-Based Filtering
It's like a shopkeeper who notices you enjoyed strawberry milk, so they handpick strawberry cookies and strawberry cake for you next.
Context Window
The size of the desk where an AI can spread out information and think at one time.
Cookie
Like the wristband you wear at a theme park, it's a tiny pass a website leaves in your browser to show you've been there.
Cookies and Sessions: How Websites Remember You
Think of a theme park wristband and the front desk's member ledger: two tools that help the internet remember who you are.
CPU vs. GPU
Think of it as a genius professor tackling complex math problems alone, teamed up with thousands of elementary students solving simple addition all at once.
Dark Mode
Like trading a glaring white book for reading glowing stars across a night sky—swapping bright backgrounds for dark ones with light text.
Data Bias
It's like writing a restaurant menu after surveying only one neighborhood's tastes: lopsided information leads to a skewed result.
Data Cleansing
Washing and trimming muddy vegetables before you start cooking.
Data Labeling
It is like flipping through a picture book with a toddler and pointing out, 'This is an apple, and this is a banana.'
Data Mining
It's like sifting a huge, endless pile of sand to pull out the real gold flakes that sparkle.
Data Roaming
It's like using your own library card at a library across town: you borrow another network's service with the account you already have.
Data Scraping
Think of it as a digital copy-paste robot that sweeps through thousands of web pages and neatly organizes scattered details into a spreadsheet in seconds, sparing humans from tedious manual copying.
Data Structures
Just as different items belong in specific drawers or hangers, data structures are customized storage organizers for computer data.
Data Transfer Appliance: The Moving Truck for Your Data
It's an express moving service for data: instead of pushing months' worth of files through an internet cable, you load them onto a giant rugged hard drive and ship it by truck.
Database Schema
It's the blueprint that fixes the size and position of every room before a new apartment building goes up, and also the boxy blank fields on a sign-up form.
DDoS Attack
It's like thousands of fake customers crowding the door of a popular restaurant, jamming the entrance so real customers can't get in at all.
Debugging
It's like picking up a magnifying glass when a machine stops, then finding and pulling out the tiny grain of sand jammed between the gears.
Decision Tree
It is a roadmap that finds the final answer by chaining yes-or-no questions, just like a game of 20 Questions.
Deep Learning and Neural Networks
Like a stack of magical lenses where each layer spots dots, lines, and shapes in turn until the whole picture snaps into focus.
Deepfake
An AI technology that copies someone's face and voice and overlays it onto someone else like an ultra-realistic digital mask.
Degaussing
It's like sweeping a super-strong magnet over a neatly arranged magnetic alphabet board to scatter the letters without a trace.
DHCP
It works like the teacher who hands out locker numbers on the first day of school, so that no two students get the same one.
Digital Forensics
Just as detectives lift fingerprints and footprints from a crime scene, digital forensics finds the invisible traces hidden inside smartphones and computers.
Digital Legacy: What Happens to Your Accounts and Photos After You Die
It's like a diary and a set of drawers, locked with a password, that stay behind in your phone and online world after you're gone.
Digital Rights Management
A smart padlock on a digital file that lets only authorized keys unlock it on approved devices.
DNS
A phone book for the internet that looks up complex numerical coordinates whenever you give it a familiar name.
Docker
A standardized shipping container for software that packs an app and everything it needs so it runs identically on any computer.
Domain Name
It's like the friend's name you save in your contacts instead of memorizing a long phone number.
DRAM
A computer component that holds memory by constantly refilling tiny, leaky cups before they run dry.
Dual Channel
It's like widening a one-lane country road into a two-lane highway, so cars can zoom along side by side without getting stuck.
Dual SIM
Like carrying two different IDs in a single wallet and pulling out whichever one fits the moment.
Dynamic Currency Conversion (DCC) Fee
It's a friendly-seeming money changer at a foreign shop who says, "Let me charge you in your familiar home currency, nice and easy," while quietly adding a pricey fee.
Dynamic DNS
It's like a food truck that moves every day and posts its current spot on a map app in real time, so regulars can always find it.
Dynamic Island
It is a smart notification board that stretches and shrinks the camera hole in your screen like a magic balloon to show you what matters.
Electronic Paper
A high-tech magnetic drawing board that moves tiny ink beads with electricity to look just like printed paper.
Embedding
It's like giving every word its own spot on a playground, so a computer that can't understand language can still tell which words belong together.
Encryption
It's like locking a precious letter in a sturdy safe, so only the person with the key can open it.
Epoch
It is like reading and solving a prep workbook once from cover to cover.
eSIM
Instead of holding a plastic ticket in your hand, you download a mobile boarding pass straight into your phone's brain.
EXIF Metadata
It's an invisible shooting diary that writes itself on the back of your photo file.
Fabless: Chip Companies That Design But Don't Manufacture
It's like an architecture firm that never builds a single building. It just draws amazing blueprints.
Facial Recognition Unlock
An electronic key that unlocks the door just by reading the unique 3D contours of your face when you look at the screen.
Firewall
It's the front-desk security guard at a building who checks badges and turns away anyone who isn't on the list.
Foundry: The Factory That Builds Other Companies' Chips
A foundry is like a specialized construction company with giant, high-tech equipment that builds the buildings for architecture firms that only draw blueprints.
Frame Rate
Like flipping through a flipbook so fast the drawings come alive, frame rate is how many still pictures your screen flips through in one second.
Framework
It's like a prefab house where the frame and foundation are already built, and you get a workbench to add your own interior.
Garbage Collection
It's like a robot vacuum for your study desk. When used-up notebooks and empty snack bags pile up, it clears them away for you.
Git
A time-travel logbook that creates save points right before major boss fights, letting you rewind whenever things go wrong.
Git Branch
Keeping the master notebook safe while scribbling freely on a fresh photocopy split off from that moment.
Git Commit
It's like a save point in a video game: you hit it right before a tough boss fight, so if you fail, you can always go back.
GitHub
It's a giant cloud library where developers from all over the world keep their blueprints and rewrite them together.
GPS Triangulation
It's like standing in a dark room while three friends call out, and working out exactly where you stand just from how long each voice takes to reach you.
GPU
If a CPU is a single math genius tackling complex problems one by one, a GPU is a massive crew of thousands of elementary students solving simple addition problems all at the same time.
H.264
It works like a flipbook where you don't redraw the background on every page. You only add the parts that move.
Haptic Technology
It's digital touch magic that makes a smooth glass screen feel like you're clicking a real pen or running your finger over tiny raised bumps.
HBM
Instead of spreading single-story houses across a wide lot, it stacks DRAM chips into a high-rise apartment with thousands of express elevators to shuttle data at blistering speeds.
HDR
A technology that lets a screen show both a dark tunnel interior and the blinding landscape outside just as clearly as your own eyes do.
Hot Reloading
It's like swapping out the lights and curtains in a moving train car without stopping the train or making anyone get off.
How Call Recording Works
It is like a single drainage pipe that merges hot water from your mic and cold water from the speaker into one shared stream.
How Wi-Fi Works
Like invisible two-way radios, your phone and router talk to each other by rapidly changing the shape of radio waves.
HTTP Status Codes
A delivery courier's three-digit status ping letting you know whether your package was delivered, couldn't find the address, or was held up at the sorting facility.
HTTP vs. HTTPS
It is like placing an open postcard inside a tamper-proof, locked steel envelope.
Identity Theft
It's like a thief wearing a mask of your face and carrying your ID, walking into a bank and pretending to be you.
Image Sensor
A semiconductor chip that collects incoming light into millions of tiny buckets and measures the amount in each one.
Incognito Mode
It is like a self-cleaning hotel room that erases every trace of your stay the moment you check out.
Inductive Wireless Charging
Instead of plugging in a cable, it waves an invisible magnetic hand between two coils to pass electricity across.
Inheritance in Programming
It is like taking your family's classic recipe book and adding your own secret sauce recipe to create a brand-new signature dish.
Input Lag
The invisible delay between clicking your mouse and seeing your on-screen character react.
Integer Overflow
Like an analog car odometer rolling past its highest number and suddenly resetting back to zero after just one more mile.
Intranet
A private digital clubhouse that only authorized team members can enter.
IP Address
A digital home address that helps letters and packages find their way to your computer in the giant city called the internet.
IPS Panel
It's an LCD screen with a wide-angle view, so the colors stay put even when you tilt your head and look from the side.
Juice Jacking
Like a pickpocket offering a cold drink to a thirsty traveler, only to quietly swipe their wallet.
Kanban
Like the order ticket rail in a busy restaurant kitchen, it's a visual board that controls how many dishes to prepare at once while showing the entire workflow at a single glance.
Kerning
Like fitting bumpy puzzle pieces together with no gaps, kerning smoothly closes the awkward space between certain pairs of letters.
Keylogger
An invisible spy hiding behind your keyboard, copying down every key you press in a little notebook.
Kill Switch
A big red emergency stop button that instantly shuts down a machine or program to protect your valuable data and personal safety.
LAN and WAN
It's the difference between the interoffice mail cart that passes notes around one building and the international courier that connects the whole world.
Large Language Model (LLM)
Think of it as your smartphone's autocomplete, but made extraordinarily smart after reading billions of books and websites.
Latency
It's the waiting time between dropping a letter in the mailbox and getting the reply back.
Layer Mask
Instead of cutting up a photo with scissors, it's like laying a sheet of black paper with cutouts over it.
Lazy Loading
Like grabbing food plate by plate at a buffet instead of piling every single dish onto your table all at once.
Legacy Code
It is like tangled plumbing behind the walls of an old house—touch one pipe, and you never know where a leak might burst.
Lens Distortion
Just like looking at the world through a round fishbowl, it is when straight lines bend and warp after passing through a camera lens.
Lens Flare
Think of it as light playing ping-pong inside your camera lens whenever you face a bright sun.
Letter Spacing (Tracking)
Like personal space in a crowd, it is the breathing room that keeps letters from feeling either cramped or scattered.
LFP Battery
Think of it as a heavy-duty cast-iron skillet among batteries: built from common, dirt-cheap iron rather than pricey metals, it takes high heat without flinching and lasts for ages.
LiDAR
Like sweeping an invisible laser cane in pitch darkness to instantly sketch a sharp 3D map of the world.
Linter
A sharp proofreader looking over your shoulder, flagging typos and awkward phrasing before you even finish drafting.
Load Balancer
It's the host at the door of a packed restaurant, spreading guests evenly across all the open tables.
Logic Bomb: The Digital Time Bomb That Waits for Its Moment
It's a digital time bomb that sits quietly and waits until the right date or condition comes around, and then it goes off.
Loopback Address
It's a letter you mail to yourself: it never leaves your computer for the outside internet.
Lossy Compression
It's what you do when your suitcase won't close: pick the clothes you probably won't wear and leave them behind.
M.2 Slot
It's a tiny connector that lets a part the size of a stick of gum lie flat on a computer board and snap into place.
Malware
An uninvited houseguest posing as a friendly visitor, only to steal your valuables or lock you out of your own home.
Merge Conflict
It's like two teammates editing the exact same sentence in a shared report differently at the same time, leaving the computer frozen because it doesn't know whose words to keep.
Merge: Combining Code in Git
It's like a group of writers each drafting their own chapters, then combining them into one finished book.
Mesh Network
Think of a playground full of kids holding hands in a chain, passing a secret note from one to the next. A mesh network works the same way: devices link up like a net and hand your data along.
Metadata
Like the shipping label stuck on a package, it tells you at a glance what's inside the box. Metadata is a label for your data.
Mobile ID: Korea's Government-Issued Digital ID on Your Phone
Instead of pulling a plastic card out of a bulky wallet, you show just the details that are needed, straight from a secure vault in your smartphone. It's a digital ID, like a driver's license in Apple Wallet.
Mobile Ordering
It's a digital order helper that sends your order slip to the kitchen from your phone, before you even reach the shop door.
Motion Blur
Like the trailing blur left behind a fast-swung baseball bat, it smears the path of movement to make speed feel real.
Motion Capture
It's like tracing dots on a person's body, except a computer copies every real movement onto a digital skeleton.
Multimodal AI
Think of a computer that used to only read text, and now it has eyes and ears too. It's an all-in-one assistant that understands pictures and voices as well as words.
MVC Pattern
It's a restaurant's division of labor: the kitchen (Model), the dining table (View), and the waiter (Controller) each have their own job.
NAND Flash
It stores information in tiny buckets that never leak, even when the power is off.
Natural Language Processing
Just like explaining the deeper meaning of an idiom to a friend, it is the technology that teaches computers to grasp human nuance and context.
NCM Battery
Three distinct metals team up like a well-balanced group project, giving electric vehicles the stamina to travel farther.
Nearby File Sharing
Just like passing a note straight to the classmate sitting next to you without going through the post office, it lets nearby devices beam large files directly to each other without touching the internet.
Network Interface Card (NIC)
It acts like a translator and post office counter, converting your computer's internal data into radio waves or electrical signals for the outside world.
Network Loop
Like the awful squeal you get when a microphone points at a speaker, data keeps circling in place and paralyzes the whole network.
Network Packet
It's like shipping a giant piece of furniture in several small boxes and reassembling it when it arrives at your door.
Network Socket
Just as you plug a lamp into a wall outlet to get power, a network socket is the software plug that lets a program connect to the internet and start a conversation.
NFC (Near Field Communication)
It is like an ultra-short-range walkie-talkie where two devices whisper to each other the moment they almost touch.
NPU
It is a microchip designed like a classroom packed with students who drilled only one subject: multiplication and addition.
Null Pointer Exception
It's the accident that happens when you hand a delivery driver a blank slip with no address on it and tell them to go deliver the package.
Number Portability in Korea
It's like keeping your home address and just switching which delivery company brings your mail: you keep your phone number and only change your carrier.
Object-Oriented Programming
Instead of writing software like a giant, step-by-step recipe, it builds programs out of specialized, snap-together Lego blocks.
OLED Burn-In
It's the mark left when a candle in one spot burns nonstop and wears out sooner than all the others.
On-Device AI
Instead of ordering delivery from a head-office chef far away every time, you've brought a skilled personal chef into your own kitchen.
One-Hot Encoding
A switchboard where only one specific light bulb turns on to tell a computer which item you picked.
One-Time Password (OTP): The Code That Works Only Once
It's like a key made of ice: it opens the lock once, then melts away, so nobody who picks it up later can use it.
Open Source
It's like a famous restaurant publishing its secret recipe, so anyone can cook it at home and even make it tastier.
Operating System (OS)
It's the general manager of a hotel, making sure every guest (app) uses the hotel's facilities (hardware) safely and fairly.
Optical Character Recognition
Think of it as a digital scribe that turns pictures of letters on paper or photos into live, searchable, and copyable text.
Optical Zoom vs. Digital Zoom
It's the difference between pulling distant writing close with a telescope and stretching a small photo you've already taken with your fingers.
Overfitting
It's a lot like a student who memorized only the answers to past exam questions, then falls apart in front of a brand-new test.
P2P (Peer-to-Peer)
It's a library with no head librarian, where friends photocopy pieces of a book for each other until everyone has the whole thing.
Package Manager
Like an app store on your phone, it finds, installs, and manages the Lego-like building blocks you need for programming, all in one place.
Packet Loss
Like a few shipping boxes getting quietly dropped at a crowded warehouse, never reaching your doorstep.
Pair Programming
Like a rally racing team where a driver steers the car while a co-driver in the passenger seat navigates the road ahead.
Passkey
It's a key you never have to memorize: it lives inside your phone, and your fingerprint or face is what takes it out to use.
Password Manager
A digital vault that securely holds unique keys to every room, unlocked with just a single master key.
Payment Escrow
Think of it as a trustworthy referee holding onto your money until you receive what you ordered and verify it's in good shape.
Periscope Lens
Just as a submarine uses mirrors to peek above the water, this technology bends light sideways to hide a long telephoto lens inside a thin smartphone.
Phishing
It's a digital scam that casts a fishing line with fake bait to snag your precious passwords and financial details.
Ping
It's like throwing a ball at a wall and timing how long it takes to bounce back, a signal that checks the state of a connection.
Pixel
A pixel is the smallest tile in the giant mosaic mural that is your screen.
Pixels and Resolution
Like the tiny colored tiles that form a mosaic, and the total size of the grid they fill.
Polling
It's like a kid in the back seat asking "Are we there yet?" every single minute until the car finally arrives.
Polygon
Flat paper mosaic tiles glued seamlessly together to shape a 3D sculpture.
Post-Processing
It is just like applying a filter to a finished photo to instantly change its mood.
Printed Circuit Board (PCB)
A city master plan that replaces hundreds of tangled wires with flat copper highways paved across a single board.
Prompt Engineering
It is like writing a crystal-clear task brief for a brilliant intern so you get the exact result you want, instead of just saying 'figure it out.'
Proxy Server
It's an internet errand runner, like sending a friend to the convenience store to buy something for you instead of going yourself.
Public IP vs. Private IP
It's like an apartment building's street address and the unit numbers inside: one is your main address on the internet, the other is a room number that only works indoors.
Public-Key Cryptography
It's like handing out open padlocks to anyone who wants one, while the only key that opens them stays in your pocket.
Pull Request
It's like editing a copy of a class newsletter and handing a note to the editor: 'Please review these changes and add them in.'
Push Notifications
It's like the front desk calling your apartment on the intercom to say a package arrived, so you don't have to keep walking down to check the mailroom.
QR Code
It's a digital notepad that packs lots of text and web addresses into a checkerboard of tiny mosaic tiles.
Qshing
A fake directional sticker secretly slapped right over a real street sign.
Queue
Like the line outside a popular restaurant, it is the fairest path there is: whoever arrives first goes in first.
RAM vs. Storage
A bigger desk lets you spread out multiple books to work faster, while a bigger bookshelf lets you store more books permanently.
Ransomware
It's a digital hostage situation: a thief sneaks a lock onto your precious diary, then threatens you to pay up if you ever want the key.
Ransomware-as-a-Service (RaaS)
It's like a franchise restaurant: you can't cook at all, but headquarters hands you ready-made sauce and recipes, and you can start selling right away.
RAW Image Format
It is not a delivered meal that is already cooked. It is a box of fresh ingredients you can cook to whatever taste you like.
Ray Tracing
It's a technique that follows a flashlight beam backward, from a mirror to your eye, to draw lifelike shadows.
Refactoring
It's like tidying up a kitchen drawer without changing what any of the utensils actually do.
Refresh Rate
It is like how many pages of a flipbook you can flick past in a single second.
Regular Expressions (Regex)
It's a custom-made fishing net for text, built to scoop up only the exact kind of text you want from a sea of characters.
Relational Database
A neat filing system where separate spreadsheet tables are linked by matching ID keys, keeping everything organized without duplicate clutter.
Rendering
Rendering is like taking an architect's blueprint and adding sunlight and textures to produce a vivid 3D picture of the finished building.
Responsive Web Design
A website like soft pudding that naturally reshapes itself to fit any dish it is placed in.
Reverse Proxy
Think of the front desk in a hotel lobby: it greets every guest first, sends them to the right department, and keeps the real back offices safe.
Rollback
Like hitting 'Undo' (Ctrl+Z) on a document, it is an emergency exit that rewinds a system back to a safe state whenever something goes wrong.
ROM (Read-Only Memory)
Like a stone tablet that survives a power cut, it is the unchanging instruction book a computer reads first when it wakes up.
Screen Resolution
Think of mosaic tiles: the tinier and more tightly packed they are, the smoother and sharper the picture looks.
Search Autocomplete
It's like a sharp assistant who guesses what you mean after one letter and finishes your sentence for you.
Semiconductor
A material crafted into electronic switches that open and close the flow of electricity like a faucet valve, generating the signals of 0s and 1s.
Semiconductor Packaging
It is the final assembly that houses a fragile, freshly baked silicon chip inside a protective shell and connects its wires to the outside world.
Serif vs. Sans-Serif
Think of it as the difference between dress shoes with ornate brogueing and a pair of minimalist white sneakers.
Server
It's like a staff-free convenience store that never sleeps: a computer that waits around the clock for your order and hands over what you asked for right away.
Session Timeout
It's like a library seat that gets released automatically when you leave it empty too long, so the next person can sit down.
Shader
A tiny rulebook that tells the computer what color to paint every single dot on your screen.
Sideloading
It is like buying goods directly from a producer's website or an open-air market instead of shopping at a vetted department store.
Smartphone App Permissions
It is like deciding which rooms a houseguest can unlock with a keycard—allowing them into the living room while keeping your bedroom locked tight.
Smishing
A bait text disguised as a friendly delivery notification that tricks you into opening a secret box packed with malware.
Social Engineering
Instead of breaking down a rock-solid vault door, you trick the caretaker into telling you the combination himself.
Software Library
Just like grabbing store-bought broth or sauce instead of simmering it from scratch each time you cook, a library is a digital toolbox packed with pre-made, reusable code functions.
Spam Call Filtering
It's like the intercom at an apartment building's front gate, checking a list of suspicious visitors and turning away pushy salespeople before they get in.
Speech Recognition: How Computers Turn Your Voice into Text
It's like an automatic note-taking assistant that catches the sound waves of your voice floating in the air and builds them into blocks of text.
Speech Synthesis
Like reading sheet music to play the piano, speech synthesis is an artificial vocal cord that reads text and speaks it aloud with human-like breathing and rhythm.
Spyware
Think of a hidden bug planted in the corner of your home. Spyware is malicious software that hides on your device, watches everything you do, and sneaks the details out.
Stack
Like a can of Pringles chips, it is a storage box where the last one put in is always the first one you take out.
Static IP vs. Dynamic IP
It's the difference between your home address that never changes and the locker ticket you get fresh each time you visit a public bathhouse.
Streaming Password Sharing Crackdown
It is like a gym checking member badges at the door to stop a whole neighborhood from sharing a single pass, ensuring only people living under the same roof can use it.
Submarine Cable
A high-speed fiber-optic highway resting deep on the ocean floor, linking the continents into one global network.
Subscription Bundling
It is a package deal, like a combo meal at a burger joint, that ties several digital subscriptions together so they cost less and are easier to use.
Supervised Learning
It's an AI learning method that's like studying a workbook with problems and answers side by side, solving it tens of thousands of times.
Surge Pricing
A smart price tag that raises its own price when you call a cab on a rainy evening commute.
Technical Debt
It's like swiping a credit card to beat a deadline: the quick-and-dirty code you write today comes back later as interest, in extra work and cost.
The 1-Won Deposit Check: How Apps Verify Your Bank Account in Korea
It's like slipping a note with a secret code into the mailbox of someone who says they live at that house, then checking whether they can read the note back to you.
The 3-2-1 Backup Rule
Think of it like making spare house keys: keep one in your pocket, one in a drawer, and leave the last one with a trusted family member across town.
The Dark Web
It's a secret basement room deep in an alley that isn't on any map, and you can only open the door with a special key.
The Moiré Effect
It is like the dizzying, wavy ripple that blooms when two fine window screens overlap.
The Turing Test
It's a guessing game: you chat by text from behind a curtain and try to tell whether the other side is a person or a machine.
Thermal Paste
Like mortar filling the gaps between rough stones, thermal paste acts as a bridge that fills microscopic air pockets between hot chips and coolers so heat can escape.
Throttling
It's like a tired marathon runner in the midsummer heat who slows down on purpose so they don't collapse from exhaustion.
Token
Tokens are the Lego bricks AI uses to read and write text.
Transformer Model
Instead of passing a secret through a game of Telephone, imagine everyone in the room sitting in a circle to look at each other all at once.
Trojan Horse
It's a dangerous invitation: it hides inside a gift box, gets carried into your house, then quietly opens the door to a thief.
TrueType
Like an elastic blueprint that never blurs or breaks into pixels, no matter how much you zoom in with a magnifying glass.
Two-Factor Authentication
It's like a double lock on your front door: after you turn the key, you also have to tap a confirmation alert on your smartphone before the door opens.
Typosquatting
Like a knockoff storefront disguised behind a single misspelled letter on its sign, it's a digital trap that snatches users who make tiny typos in their address bar.
Under-Display Camera
Like peeking out from behind a sheer lace curtain, it lets light slip through tiny gaps between screen pixels to take photos without cutting a hole in your display.
Unicode
A universal digital dictionary that assigns a single, globally recognized identification number to every character on Earth.
Unstructured Data
Instead of socks sorted neatly into drawer dividers, it is like a backpack stuffed freely with all kinds of gear.
UTF-8
It gives every character in the world its own number tag, then packs low-numbered characters in thin wrapping and high-numbered ones in thick wrapping.
Variable Bitrate
A thrifty way to deliver video: spend lots of data on busy, flashy scenes, and save data on simple, quiet ones.
Vector Graphics
Instead of filling a wall with colored mosaic tiles, it's like drawing with a rubber-band blueprint between anchor points.
Vendor Lock-In
It's like buying a coffee machine that only takes its own capsules. Even if you like another brand's beans better, you keep buying those capsules unless you throw the machine away.
Viewing Angle
It's the screen's sweet spot range—determining whether a movie looks just as good from a corner seat in the front row as it does from dead center.
Vishing
A masked phone call designed to win your trust with a friendly tone, unlocking both your guard and your passwords.
Voxel
Take the dots (pixels) of a flat screen, bring them into a 3D world, and stack them up. A voxel is a digital LEGO brick.
VPN
A private underground tunnel built right through a crowded public highway just for you.
Wafer
It's a round slab like pizza dough, the blank canvas on which countless electronic circuits are carefully etched to make a semiconductor.
Web Cache
It's like keeping the book you read all the time on your desk, instead of fetching it from a faraway shelf every single time.
White Balance
A camera's built-in tint adjuster that keeps a white sheet of paper looking truly white, whether under warm yellow lamps or a cool blue sky.
White Hat Hacker
A white hat hacker is a "friendly burglar" who tries your locks before a real thief does, finds the weak window, and helps you fix it.
Wi-Fi 6
It's like turning a narrow one-car-at-a-time road in rush hour into a road with dedicated lanes where many cars can move at once.
Wi-Fi Roaming
It's like a relay race for your connection: as you walk around a big building, a nearby router takes the baton so smoothly you barely notice a break.
Wireless Access Point (WAP)
It's like a cell tower for your room: it takes the internet coming out of a wall cable and spreads it through the air as a wireless signal.