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

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

Reverses the undo to restore a change. Not as common as undo since mistakes are more frequent.

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

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

Removes the selected data and copies it to the clipboard.

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

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

A Command Line Interface for controlling a computer by typing text commands. Still has its uses!

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