Copy:
Windows: Ctrl + C
Mac: Cmd + C
Paste:
Windows: Ctrl + V
Mac: Cmd + V
Cut:
Windows: Ctrl + X
Mac: Cmd + X
Undo:
Windows: Ctrl + Z
Mac: Cmd + Z
Redo:
Windows: Ctrl + Y
Mac: Cmd + Shift + Z
Switch Between Open Apps:
Windows: Alt + Tab
Mac: Cmd + Tab
Close Current Window:
Windows: Alt + F4
Mac: Cmd + W
Minimize Window:
Windows: Windows Key + Down Arrow
Mac: Cmd + M
Maximize/Restore Window:
Windows: Windows Key + Up Arrow
Mac: Cmd + Control + F
Open New Tab:
Windows: Ctrl + T
Mac: Cmd + T
Close Tab:
Windows: Ctrl + W
Mac: Cmd + W
Reopen Closed Tab:
Windows: Ctrl + Shift + T
Mac: Cmd + Shift + T
Search on Page:
Windows: Ctrl + F
Mac: Cmd + F
Bold Text:
Windows: Ctrl + B
Mac: Cmd + B
Italicize Text:
Windows: Ctrl + I
Mac: Cmd + I
Underline Text:
Windows: Ctrl + U
Mac: Cmd + U
Rename File:
Windows: F2
Mac: Enter (after selecting the file)
Delete File:
Windows: Delete
Mac: Cmd + Delete
Open File Explorer/Finder:
Windows: Windows Key + E
Mac: Cmd + Shift + N (new folder in Finder)
Take Screenshot:
Windows: PrtScn (Print Screen) or Windows Key + Shift + S
Mac: Cmd + Shift + 3 (full screen) or Cmd + Shift + 4 (select area)
Lock Computer:
Windows: Windows Key + L
Mac: Cmd + Control + Q