K-Culture GlossaryㅌWords from the people who build
Terminal
A black screen where you type commands as text. It's where CLI tools run, and it shows up in the background of every AI coding story.
In plain words
A terminal is a window where you type commands in text and get answers back in text. That black window you see in every developer's screen — that's the terminal, and it's where CLI tools run. Think of it as a text conversation with your computer: you send a line, the computer sends a reply.
The name comes from old computers. It traces back to the "terminal" — a device for input and output connected to a room-sized central computer. The machines are gone, but the name stuck, and now it lives on as a program inside Mac and Windows.
The reason terminals keep showing up in AI coding news is that the tools everyone's talking about run inside them. Sentences like "one line in the terminal and the install is done" or "typed a request into the terminal and AI built the app" are exactly this. For developers, the terminal is the most direct door into commanding a computer, and AI tools are now lining up at that door.
How it shows up in the news
"Installation is done by pasting one command into the terminal" — meaning this isn't an app store download, but a developer-style install where you type text commands into the black window.
Try it yourself
- On Mac, search "Terminal" in Spotlight; on Windows, search "PowerShell" in the Start menu, and open it.
- Type whoami — the computer will answer with your account name. Type date and it'll answer with the date.
- Just looking around won't cause any harm. As long as you don't run commands you don't understand, the terminal isn't scary — just don't paste a delete (rm) command someone gave you until you know what it does.
CLI vs. Terminal: what's the difference
The window where it happens, The way work gets done
Both look the same — black window, typed text going back and forth — so people use the words interchangeably. But one is a window, and the other is a tool that runs inside it. That's why "I opened the terminal but Claude Code isn't there" makes sense: the window is already there by default, but the tool has to be installed separately.
| Aspect | Terminal | CLI |
|---|---|---|
| What it is | The window that runs those tools and displays the results | A way of giving instructions through typed commands, and the tools that do so |
| In numbers | Usually just one kind is used — Terminal on Mac, PowerShell on Windows | Hundreds exist. The more you install, the more you have |
| Examples | Mac Terminal, iTerm, Windows Terminal | Claude Code, Codex, Gemini CLI, git |
| If you swap it | Switching to a different window changes nothing about what you can do | Installing a different tool changes what you can do |
| Analogy | The counter itself where that task is handled | The task handled at the counter |
Rule of thumbIf it has to be installed, it's a CLI tool. If it comes with the computer by default, it's a terminal.
See also
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