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IBM introduced the first floppy disk in 1971. The memory disk was 8 inches in diameter and could hold 80KB of memory. It did not work well when dirty so IBM put covers on them.
The IBM Personal Computer was introduced in 1981. It came with an Intel processor, 16KB of user memory - expandable to 256KB, up to two floppy disks, and an optional color monitor. The operating system was called DOS and was made by a 32-person company called Microsoft.
In 1986 IBM, scientists won the Nobel Peace Prize for the scanning tunneling microscope - which would eventually manipulate atoms to spell I-B-M.