
1) List of choices on a computer 2) Result of some hovering 3) Window screen
Found on
https://www.crosswordclues.com/clue/pop-up-menu

a menu available by clicking an icon within a dialogue box - the icon is often placed alongside a display showing the current setting of that option
Found on
http://www.archivemag.co.uk/

In computing, a menu that appears in a (new) window when an option is selected with a mouse or keystroke sequence in a graphical user interface (GUI), such as Microsoft Windows. Compare with pull-down menu
Found on
https://www.encyclo.co.uk/local/21221
No exact match found.