POST

• Power-on self test
• BIOS tries to start the computer
• Tries main components of the computer
• Uses ROM Chip

ROM

• Read Only Memory
• Responsible for executing instructions
• Called BIOS ROM chip

BIOS

• Basic Input Output System
• Checks following
  • Video Card
  • Keyboard
  • CPU
  • Network Card
  • RAM
• To enter press F2, F10 or the “delete” key depending on your BIOS

CMOS

• Complementary Metal Oxide Semiconductor
• Controls BIOS/UEFI settings
• Saved to CMOS Chip
• CMOS battery provides power to the chip

UEFI

• Unified Extensible Firmware Interface