21. 1981 IBM PC
In 1981, the IBM PC iwas built, one of the first computers intended for home consumer use. The IBM PC costs $1,565, and was the smallest and cheapest computer built to-date. IBM hired Microsoft to write an operating system for its PC, which was called MS-DOS.
22. 1983 Scanning Tunneling Microscopy
IBM researchers invented scanning tunneling microscopy, that produces for the first time three-dimensional images of the atomic surfaces of silicon, gold, nickel and other solids.23. 1986 Nobel Prize
IBM Zurich Research Laboratory fellows Gerd K. Binnig and Heinrich Rohrer win the 1986 Nobel Prize in physics for their work in scanning tunneling microscopy. Drs. Binnig and Rohrer are recognized for developing a powerful microscopy technique which permits scientists to make images of surfaces so detailed that individual atoms may be seen.



