📖 Quick Glossary
Every topic in one sentence. Click a term for the full explanation.
🤖 AI
Software that learns patterns from lots of data and uses them to make guesses or decisions.
🧩 Algorithms
A set of step-by-step instructions for solving a problem — like a recipe, but for a computer.
🔌 API
A way for one app or website to ask another app or website for information.
⛓️ Blockchain
A shared list of records that many computers all keep a copy of, making it very hard to tamper with.
🧭 Browsers
A program that reads website code and turns it into the pages you see on screen.
☁️ Cloud
"The cloud" just means using other people's computers on the internet instead of your own.
🍪 Cookies
A small file a website saves on your device to remember things about you, like that you're logged in.
🎨 CSS
Decides how a website looks — colours, fonts, spacing, and layout.
🛡️ Cybersecurity
The practice of protecting computers, data, and networks from people who want to access them without permission.
🗄️ Databases
An organised store of information that apps can search, read, and update instantly.
📖 DNS
Like a phone book for the internet — it translates website names like "google.com" into the address computers actually use.
🎭 Frontend vs Backend
The frontend is everything you see in a browser; the backend is the invisible logic and data storage that powers it.
📦 Git
A tool that keeps track of changes you make to your code over time.
📄 HTML
The language that tells a website what things exist on a page, like text, buttons, and images.
🔒 HTTPS & Encryption
Encryption scrambles your data so only the intended recipient can read it — the padlock in your browser means this is happening.
🌐 The Internet
A giant network of computers all around the world that are connected together and can talk to each other.
📡 IP Addresses
A unique number assigned to every device on the internet, so data knows where to go and where to come back from.
📨 IP Packets
A small chunk of data wrapped with sender and destination addresses, sent across the internet and reassembled at the other end.
⚡ JavaScript
Lets websites do things when you interact with them, like clicking buttons or filling in forms.
🧠 Machine Learning
The technique where software improves at a task by practising on lots of examples, without being told the rules.
🌱 Open Source
Software whose code anyone can read, use, copy, and improve — built in public, often for free.
🗣️ Programming Languages
A set of words and rules humans use to write instructions that a computer can follow.
🖥️ Servers
A computer that's always turned on and ready to send websites or data to other computers.
⌨️ Terminal
A text-based window where you type commands directly to your computer, instead of clicking buttons and icons.
🔐 Two-Factor Authentication
Proving who you are in two different ways — like your password plus a code sent to your phone.
🔗 URLs
The full web address of a page — it tells your browser exactly which server to contact and which page to ask for.
🌍 Websites
A bunch of pages stored on a computer somewhere else, which your computer asks to see.