Excerpts from Books and Wikipedia
". . . introduction by the International Business Machine (IBM) company of a new personal computer in 1981. . . . The first 5150 contained the Intel 8088 CPU (central processing unit), a single floppy disk drive, and 64 KB of RAM and was the brainchild of engineer Don Estridge. The decision to supply the computer with Microsoft's DOS operating system was the foundation for that company's domination of the software market." [Furtado: 1001 Days]