Friday 14 December 2012

top 10 operating systems

Top 10 Operating Systems Details

In the 1940s, the earliest electronic digital systems had no operating systems. Electronic systems of this time were programmed on rows of mechanical switches or by jumper wires on plug boards. These were special-purpose systems that, for example, generated ballistics tables for the military or controlled the printing of payroll checks from data on punched paper cards. After programmable general purpose computers were invented, machine languages (consisting of strings of the binary digits 0 and 1 on punched paper tape) were introduced that sped up the programming process (Stern, 1981).
OS/360 was used on most IBM mainframe computers beginning in 1966, including the computers that helped NASA put a man on the moon.

In the early 1950s, a computer could execute only one program at a time. Each user had sole use of the computer for a limited period of time and would arrive at a scheduled time with program and data on punched paper cards and/or punched tape. The program would be loaded into the machine, and the machine would be set to work until the program completed or crashed. Programs could generally be debugged via a front panel using toggle switches and panel lights. It is said that Alan Turing was a master of this on the early Manchester Mark 1 machine, and he was already deriving the primitive conception of an operating system from the principles of the Universal Turing machine.


Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
Top 10 Operating Systems
                    

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