The software world
Terminal
shell
The window where you type commands and read their output — a plain-text way to talk to your computer. Same machine as your usual desktop, just a different door in. ("Shell" is the program inside it that actually reads your commands.)
Why it matters
Part of The app vs the command line → It's the power-user door into Claude Code and most developer tools. It looks intimidating; it's really just a text conversation with your computer — and with Claude Code Desktop you don't have to open one to get started.
see also