While the very first computers did not have operating systems, the lack of them made computers less efficient and more difficult to use. We look at the general history of operating systems before getting into the history of DOS. Then we look at some general principles of what operating systems do.

Links:

http://webopedia.com/

http://webopedia.com/TERM/o/operating_system.html

https://www.telegraph.co.uk/technology/0/worst-tech-predictions-of-all-time/thomas-watson-ibm-president-in-1943/

https://en.wikipedia.org/wiki/Time-sharing

https://en.wikipedia.org/wiki/Multics

http://webopedia.com/TERM/C/CPU.html

http://webopedia.internet.com/TERM/u/user_interface.html

http://dougengelbart.org/

http://webopedia.internet.com/TERM/G/Graphical_User_Interface_GUI.html

https://www.amazon.com/Fumbling-Future-Invented-Personal-Computer/dp/1583482660

http://www.cryptonomicon.com/beginning.html

https://www.ahuka.com/dos-lessons-for-self-study-purposes/dos-lesson-1-operating-systems/