The AI Glossary
Every term explained like you're a smart person who just hasn't learned this stuff yet. Because that's exactly what you are.
AGI
Artificial General Intelligence
AI that can do everything a human can. We don't have it yet. Anyone who says we do is selling something.
AI Agent
AI that actually does things
An AI that doesn't just answer questions — it takes actions. The difference between a GPS that gives directions and a self-driving car that drives you there.
Algorithm
Step-by-step instructions for computers
A set of step-by-step instructions to solve a problem. Like a recipe, but for computers. Every time Netflix recommends a show, that's an algorithm at work.
Alignment
Making AI do what we actually want
The challenge of making sure AI does what humans actually MEANT, not just what they technically said. Like the monkey's paw — you got your wish, just not the way you wanted.
API
Application Programming Interface
A menu that lets apps order from other apps. Your weather app uses an API to ask a weather service for the forecast.
Automation
Let robots do the boring stuff
Making computers do repetitive tasks so you don't have to. If you copy-paste the same data between apps every day, that's a job for automation, not a human.
Backend
What happens behind the scenes
The behind-the-scenes part of an app — databases, servers, logic. The kitchen to the frontend's dining room.
Bandwidth
How much data fits through the pipe
How much data can flow through a connection at once. Think of a highway — more lanes means more cars can pass. More bandwidth means faster downloads.
Benchmark
Standardized tests for AI
The SATs but for robots. Standardized tests that let companies prove their AI is smarter than the competition — or at least better at taking tests.
Bias
When AI inherits our prejudices
AI learns from human data, and humans are biased. So AI picks up those biases too. If you only show it photos of male CEOs, it assumes all CEOs are male.
Cache
Saving a copy so you don't have to fetch it again
Keeping a nearby copy of something so you don't have to go get it every time. Like photocopying a library book so you don't have to drive back for every reference.
CDN
Content Delivery Network
Copies of your website stored around the world so it loads fast everywhere. Like having franchise locations instead of one store that everyone has to drive to.
Chatbot
A program you talk to
Software that talks back. The old ones were dumb (press 1 for billing). The new ones (ChatGPT, Claude) are scarily smart. Same category, completely different league.
ChatGPT
The AI tool that started it all
OpenAI's chatbot that made AI mainstream. It's the one your coworkers won't shut up about.
Churn
When customers leave
The rate at which customers cancel their subscriptions. The silent killer of subscription businesses.
Claude
Anthropic's AI — the thoughtful one
Anthropic's AI assistant. Like ChatGPT's more careful, thoughtful cousin who actually reads the whole document.
Claude Code
AI coding in your terminal
Anthropic's coding tool that works in your terminal. Point it at your project and it reads, writes, and edits code for you.
Cloudflare
The internet's bodyguard
A company that protects websites, makes them faster, and hosts them. They sit between your site and the internet like a bouncer.
Computer Vision
Teaching computers to see
Teaching computers to understand images and video. Like showing a toddler 10 million cat photos until they can spot a cat anywhere — except the toddler is a GPU.
Cookie
How websites remember you
A tiny file websites save on your computer to remember who you are. That's why Amazon remembers your cart and why ads stalk you across the internet.
Copilot
GitHub's AI coding assistant
GitHub's AI that autocompletes your code as you type. Like autocorrect, but for programming. Made by Microsoft.
Cursor
AI-powered code editor
A code editor with AI built in. You describe what you want, it writes the code. The ultimate vibe coding tool.
Database
Where data lives
A structured place to store data. Think of it as a really organized digital filing cabinet that can find anything instantly.
Debugging
Finding out why it's broken
The art of finding and fixing what's broken in code. 90% of programming is just figuring out why the thing you wrote doesn't work. Named after an actual bug in a computer in 1947.
Deep Learning
Neural networks with many layers
Neural networks with lots of layers stacked up. The 'deep' just means there are many layers. That's literally it.
Deploy
Putting your app on the internet
Taking your app from 'works on my computer' to 'works for everyone on the internet.' The moment it gets real.
Diffusion Model
The tech behind AI art
The technology powering AI image generators like Midjourney and DALL-E. It learns by adding noise to images, then learns to remove it. Like learning to clean by first messing up.
DNS
The internet's phone book
Translates 'google.com' into the actual numbers computers use to find each other. Without DNS, you'd need to memorize IP addresses like 142.250.80.46 for every website.
Docker
Ship it exactly as you built it
A way to package software so it runs the same everywhere. Like shipping a frozen dinner instead of raw ingredients — no more 'but it worked on MY computer' excuses.
Embedding
Turning meaning into math
Converting words, images, or anything into a list of numbers that captures their meaning. It's how AI knows 'happy' and 'joyful' are close but 'happy' and 'refrigerator' aren't.
Encryption
Secret codes for the digital age
Scrambling data so only the right person can read it. Like writing a letter in a secret code that only your friend can decode. Without it, the internet would be a free-for-all.
Fine-tuning
Teaching AI to specialize
Taking a general AI and training it to be an expert at one specific thing. Like teaching a general practitioner to be a heart surgeon.
Framework
Pre-built code scaffolding
Pre-built code that gives you a head start. Like buying a house with the foundation already poured instead of starting from dirt.
Frontend
What users see and click
The part of an app you can see — buttons, text, images, colors. If you can click it or look at it, it's frontend.
Generative AI
AI that creates new stuff
AI that doesn't just analyze — it CREATES. Text, images, code, music, video. The 'gen' in GenAI. This is the revolution everyone's talking about.
GitHub
Where code lives
Social media for code. It's where developers store, share, and collaborate on software projects. Owned by Microsoft.
GPT
Generative Pre-trained Transformer
The model family behind ChatGPT. It's the engine — ChatGPT is the car you drive.
Hallucination
When AI makes stuff up
When AI confidently tells you something that's completely wrong. Like that friend who never admits they don't know.
IDE
Integrated Development Environment
A fancy text editor for writing code. Like Microsoft Word but for programmers, with autocomplete, error checking, and 47 features you'll never use.
Inference
When AI uses what it learned
Training is studying for the exam. Inference is taking it. It's the moment AI actually uses its knowledge to give you an answer.
JSON
How computers share data
The universal language computers use to share structured information. It looks like a bunch of curly braces and quotes, but it's actually super logical and readable.
Latency
The annoying delay
The delay between asking and getting an answer. When your video call freezes for 2 seconds — that's latency. Lower is always better.
LLM
Large Language Model
The brain behind ChatGPT. It read the entire internet and now it guesses what word comes next. Really, really well.
Machine Learning
Computers that learn from experience
Instead of programming every rule by hand, you show the computer thousands of examples and let it figure out the pattern. Like learning to cook by tasting, not reading recipes.
Markdown
Simple formatting with symbols
A dead-simple way to format text using symbols like # for headings and ** for bold. You've probably used it on Reddit or Discord without knowing its name.
Model
The trained brain of an AI
The finished product after training — the 'brain' that does the thinking. GPT-4, Claude, Llama — those are all models. Billions of dollars of training, packaged up for you to use.
MRR
Monthly Recurring Revenue
How much money your subscription business makes every month like clockwork. The number that makes investors excited.
Multimodal
AI that sees, hears, AND reads
AI that handles multiple types of input — text, images, audio, video — all at once. A Swiss Army knife instead of just a blade.
MVP
Minimum Viable Product
The 'good enough to test' version of your product. Ship the skateboard, not the half-built car.
Neural Network
Loosely inspired by brains
A computer system loosely inspired by how brain cells connect. It's how AI learns patterns. Don't worry — it's not actually a brain.
NLP
Natural Language Processing
Teaching computers to understand human language — sarcasm, slang, and all. It's why Siri sometimes gets you and sometimes thinks you said something completely unhinged.
No-Code / Low-Code
Building without writing code
Tools that let you build apps by dragging, dropping, and clicking instead of writing code. Like Squarespace but for apps.
Open Source
Free code anyone can use
Software where the code is public and free. Anyone can use it, modify it, and learn from it. Most of the internet runs on it.
Parameter
The dials inside an AI's brain
The internal 'dials' that get tuned during training. GPT-4 has hundreds of billions of them. More parameters generally means smarter (and way more expensive).
Product-Market Fit
When people actually want what you built
The magical moment when people want your product so badly they'd be upset if you took it away. The hardest thing in startups.
Prompt
The thing you type into AI
The instruction you give an AI. Better prompts = better answers. It's like asking good questions at a bar.
RAG
Retrieval-Augmented Generation
Teaching AI to Google things before answering you. Reduces the 'making stuff up' problem.
Reinforcement Learning
Learning by trial, error, and treats
AI that learns by trying stuff and getting rewards or punishments. Like training a dog — do the right thing, get a treat. Do the wrong thing, no treat.
Repository
Your project's time-traveling folder
A project folder that remembers every change ever made. Like Google Docs version history, but for your entire codebase. Usually called a 'repo' for short.
SaaS
Software as a Service
Software you pay for monthly instead of buying once. Netflix for apps. The holy grail of tech businesses.
Serverless
There are still servers (you just don't care)
There ARE still servers — you just don't manage them. Like taking an Uber instead of owning a car. Someone else handles the maintenance, insurance, and parking.
SSL/TLS
The padlock in your browser
The padlock icon that means your connection is secure. Without it, sending your password would be like shouting your credit card number across a crowded room.
Supabase
Open-source Firebase alternative
A service that gives you a database, authentication, and storage in one package. The backend you don't have to build.
Supervised Learning
Learning from labeled flashcards
Teaching AI with labeled examples: 'This is a cat. This is a dog. Now YOU tell me.' Flashcards for robots.
Text-to-Image
Type words, get pictures
You type 'a cat riding a motorcycle through space' and AI creates that image. The most mind-blowing parlor trick in tech right now.
The Cloud
Someone else's computer
It's just someone else's computer that you rent. When someone says 'it's in the cloud,' they mean it's stored on a server in a data center somewhere. That's it.
Token
The chunks AI reads text in
AI doesn't read words — it reads chunks called tokens. Think of them as syllables for robots.
Training Data
You are what you eat (AI edition)
The examples AI learns from. Feed it garbage, it produces garbage. Like raising a kid on nothing but reality TV — don't be surprised by the results.
Transformer
The architecture behind modern AI
Not the movie robots. It's the math breakthrough from 2017 that made ChatGPT, Claude, and basically all modern AI possible. The engine inside the car.
Vector Database
A database that understands meaning
A special database that finds things by meaning instead of exact matches. Like a librarian who finds books by vibes instead of just by title.
Vercel
Where Next.js apps live
A hosting platform that makes deploying websites stupidly easy. Push your code, boom — it's live.
Version Control
A time machine for your code
A system that tracks every change to your project so you can undo mistakes. Like a time machine: 'Take me back to Tuesday when everything still worked.'
Vibe Coding
Building apps with AI assistance
Writing code by describing what you want to an AI, then letting it write the actual code. It's how I built my first app.
Webhook
Automatic notifications between apps
An automatic notification from one app to another when something happens. Instead of checking your mailbox every 5 minutes, the mailman rings your doorbell.
Windsurf
AI code editor with flow
Another AI code editor, known for smooth multi-file editing. Like Cursor's chill younger sibling.