The Commodore 128 (also referred to as the C128, CBM 128, C=128) home/personal computer was the last 8-bit machine commercially released by Commodore Business Machines (CBM). Introduced in January 1985 at the CES in Las Vegas, it appeared three years after its predecessor, the bestselling Commodore 64.
The C128 was a significantly expanded successor to the C64 and unlike the earlier Commodore Plus/4, nearly full compatibility with the C64 was retained, in both hardware and software. The new machine featured 128 kB of RAM, in two 64 kB banks and an 80-column RGBI video output (driven by the 8563 VDC chip with 16 kB dedicated video RAM), as well as a substantially redesigned case and keyboard. Also included was a Zilog Z80 CPU which allowed the C128 to run CP/M, as an alternate to the usual Commodore BASIC environment.
Source: Wikipedia, "Commodore 128", available under the CC-BY-SA License.