Bios Enter Key

Acer
ALT + F10 (Acer eRecovery)

Asus

ESC (Boot Selection Menu)
F9 (Asus Laptop Recovery)

Apple (Models 2006+)

Command + Option + P + R (PRAM and NVRAM Reset)
Command + S (Boot into Single-User Mode)
Command + V (Boot with Verbose Status)
Option (Select Hard Drive Boot Volume)
Option + N (Boot Image from Netboot Server)
Shift (Boot into Safe Mode)
C (Boot from CD Drive)
D (Boot from OS/X CD and perform Hardware Test)
N (Boot from Network)

Dell

CTRL + F11 (Dell™ PC Restore by Symantec)
F8 (At PC Startup) -> Repair Your Computer -> Dell Factory Image Restore

EI Systems

F10 (System Recovery)

Fujitsu

F2 (BIOS Setup)
F12 (Boot Menu)

Gateway

F11 or R (Gateway Recovery)

HP / Compaq Desktops

F10 (HP Recovery)

HP Pavilion / Compaq Laptops

ESC (Startup Menu)
F1 (System Information)
F2 (System Diagnostic)
F9 (Boot Device Options)
F10 (BIOS Setup)
F11 (System Recovery)

IBM ThinkPad

F11 (IBM Product Recovery)

Lenovo

Lenovo-OneKey-Button15x15 (Lenovo OneKey Rescue System)
F2 (BIOS Setup)

Packard Bell

F11 (Recovery Program)

Sony Vaio

F10 (VAIO Recovery Wizard)

Toshiba

0 (Zero) (Toshiba Harddrive Recovery Utility)
F2 (Setup Utility)
F8 (Advanced Boot Options Menu)
F12 (Boot Menu