Reply #15: Definitions of the relevant terms from wikipedia

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CMOS refers to both a particular style of digital circuitry, and the family of processes used to implement that circuitry on integrated circuits (chips). CMOS logic on a CMOS process dissipates less energy and is more dense than other implementations of the same functionality. As this advantage has grown and become more important, CMOS processes and variants have come to dominate, so that as of 2004 the vast majority of integrated circuit manufacturing by dollar volume is on CMOS processes.

In computing, the Basic Input-Output System or BIOS is computer interface code that locates and loads the operating system into RAM. It provides low-level communication, operation and configuration to the hardware of a system, which at a minimum drives the keyboard and provides primitive output to a display.