Computer shortcut key uses

4. 

Ctrl + Z: Undo last action

 Here are some common keyboard shortcuts for Windows computers:

1. Ctrl + C: Copy selected text or item
2. Ctrl + X: Cut selected text or item
3. Ctrl + V: Paste copied or cut text or item
4. Ctrl + A: Select all items or text
5. Ctrl + F: Find text within a document or webpage
6. Ctrl + S: Save current document or file
7. Ctrl + P: Print current document or file
8. Ctrl + Alt + Del: Open the Windows security options menu
   
9. Windows key + E: Open Windows File Explorer

Here are some common keyboard shortcuts for Mac computers:

1. Command + C: Copy selected text or item
2. Command + X: Cut selected text or item
3. Command + V: Paste copied or cut text or item
4. Command + Z: Undo last action
5. Command + A: Select all items or text
6. Command + F: Find text within a document or webpage
7. Command + S: Save current document or file
8. Command + P: Print current document or file
9. Command + Q: Quit the current application
10. Command + Space: Open Spotlight search