Short for Operating System. The main software that manages your computer’s hardware and software.

Your portal to the internet. Chrome, Firefox, and Edge are some of the most popular.

A small graphic that represents a file, folder, or program. Double-click an icon to open it.

A Graphical User Interface, which is how most modern OSes and apps present themselves.

That little area, usually bottom-right on Windows, that holds status icons and background apps.

A text-based interface for running commands. Called Command Prompt on Windows, and Terminal on Mac.

A tool for easily installing, updating, and managing software. Essential for Linux users.

Provides info about running processes and resource usage. Helps identify unresponsive programs.

Inserts the data from the clipboard at the current cursor position.

Reverses the last action. A real lifesaver for those accidental deletions!