The two common types of BIOS (Basic Input/Output System) are:
RAM BIOS (Random Access Memory BIOS): This term isn't commonly used. BIOS typically resides in ROM (Read-Only Memory), not RAM. RAM is volatile memory, while BIOS requires non-volatile memory to store firmware that initializes and boots the computer.
ROM BIOS (Read-Only Memory BIOS): This is the standard type of BIOS, where the firmware is stored in a chip on the computer's motherboard. It provides essential instructions for the computer's hardware and boot process.