hey guys something :
Alt+Tab (hold Alt and pressing on Tab) : to switch between opened windows.
Control+a : mark all in word document, Excel, web page.......
Control+c : copy
Control+v : paste
Control+x : cut
Control+f : for find a word.... in a text
Control+g : for got a line in a text
Control+z: Undo
Control+y: Redo
Alt+f4 :for close a window
Shift+direction flesh (hold Shift) to mark a word......
i think that many ppl know this

but i want to shared with u