HISTORY OF OPERATING SYSTEM

      History of computer operating systems recapitulates to a degree the recent history of computer hardware.

      Functions needed and used by most application programs on a computer, and the linkages needed to control and synchronize computer hardware.

      The growing complexity of hardware and application programs eventually made operating systems a necessity.

      The earliest computers were mainframes that lacked any form of operating system

      The program would be loaded into the machine, and the machine would be set to work until the program completed or crashed.