The IBM Personal Computer model number 5150 is the original
version and progenitor of the IBM PC compatible hardware platform.
It was created by a team of engineers and designers under the
direction of Don Estridge of the IBM Entry Systems Division in Boca
Raton, Florida. The project was given the code name Project Chess.
Abandoning the usual design process, a special team was
assembled with authorization to bypass normal company restrictions
and get something to market rapidly. They were able to develop the
PC in about a year. To achieve this they first decided to build the
machine with "off-the-shelf" parts from a variety of different
original equipment manufacturers (OEMs).
The machine was launched on August 12, 1981. It had 128
kilobytes of memory (expandable to 256 kilobytes), one or two
floppy disks and an optional color monitor. Pricing for the machine
started at $1,565 for a bare-bones configuration without disk
drives.