The oldest operating system is Version 6 Unix 1975 and the next is 1BSD 1977, then we can find the Apple DOS 1978, in several years we have Mac OS (System 1.0) 1984, in 1985 was born one of the most popular OS in the world Windows 1.0, and Linux version 0.01-0.1 is the newest in 1991.
Nowadays we can find other system like android, windows 10 or Chrome OS.
