How to enter BIOS: Sony, Acer, HP- Compaq, Toshiba, IBM, Dell, Lenovo-Idea

Sony:
Press and hold the F2

Lenovo/Idea:
Immediately press (Fn+) F2 or (Fn+) F1 key 5-10 times after power on button is pressed.

HP/Compaq:
While the display is blank, press the F10

Asus:
Press and hold the F2

Toshiba:
Press F2 key repetitively until BIOS shows up

IBM:
Press F1 key repetitively until BIOS shows up.

Acer:
Press Del.
For Boot menu press F2

Dell:
Press F2