tags: os operating-system is_child_of: operating-systems
History of Operating System
Generation 1945-55 of Vaccum Tubes
- Vaccum tubes were used in computers that were very slow.
Generation 1955-65 of Transistors and Batch systems
- Transisters were used in computers.
- Tasks were carried out batch sytems.
- In batch system, tasks were divided in parts.
- To run a program, program as to write programs on card.
- Programs from those cards where written on magnetic taps using a reader.
- Those taps where then provided to mainframe computer who actually does computing.
- Output where written on magnetic taps by mainframe computer.
- Output taps then provided to reader again to print the output through printer.
Generation 1965-80 of ICs and multiprogramming
- Computer systems became more compact by the introduction of ICs.
- This was the time of mutiprogramming where various users can access a single mainframe computer.
- These computers were used in time sharing mode.
- MULTICS(Multiplexed information and computing service) was a an operating system designed for time sharing.
- MULTICS leads the development of UNIX. An employee in MULTICS named Ken Thompson developed UNIX.
- By seeing MULTICS as it was open source, a Finnish student Linos Torvalds developed Linux.