Douglas
Engelbart demonstrates the world’s
first “mouse”, nicknamed after the “tail”.
SRI (Stanford Research Institute)
received a patent on the mouse in 1970, and licensed it to apple for $40,000.
Sunday, February 9, 2014
What is an Operating System? and History of Operating Systems
What is an Operating System?
It is an extended machine
§ Hides the messy
details which must be performed. § Presents user with a virtual machine, easier to use.
It is a resource manager
§ Each program gets
time with the resource.
§ Each program gets
space on the resource
History of Operating Systems
Early batch system
§ Bring cards to 1401.
§ Read cards to tape
put.
§ Tape on 7094 which does
computing
§ Put tape on 1401
which prints output
First generation
1945-1955
§ vacuum tubes, plug boards
Second generation
1955 – 1965
§ transistors, batch systems
Third generation 1965
– 1980
§ ICs and multiprogramming
Fourth generation
1980 – present
§ Personal computers
The Operating System Zoo
§ Mainframe operating
systems
§ Server operating
systems
§ Multiprocessor
operating systems
§ Personal computer
operating systems
§ Real-time operating
systems
§ Embedded operating
systems
§ Smart card operating
systems
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