Ctrl-A

Ctrl-A selects All. "A", get it?

In Microsoft Word, use Ctrl-A to select all the text in the document. Copy and paste it where you will.

Choose View Header and use Ctrl-A to select the entire contents of the header.

In Windows Explorer use Ctrl-A to select all the files in the right-hand pane. Use Ctrl-Click to un-select specific names. You can now select all files "but these few" prior to copying or deleting files from a folder.

¨ Ctrl-A Selects All even when the Edit menu is unavailable.