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A single program operating system allows only one program to run at a time.
A Multitasking Operating System
it allows only one user to run a same program as another user at a same time
One example of a time-sharing system is the bank's bankcard system, which allows hundreds of people to access the same program on the mainframe at the same time. The Multics & Unix operating systems are time sharing Operating Systems
It is a software which allows more than one program to run at one time
Real time operating system controls machinery and industrial equipment. Another is a mult-user system that allows many users to perform various duties.
1. BATCH PROCESSING operating system 2. MULTIPROGRAMMING operating system 3. TIME SHARING operating system 4. REAL TIME operating system 5. DISTRIBUTED operating system
A time shared operating system allows many users to share the computer simultaneously.since each action or command in a time shared system trends to be short,only a little cpu time is needed for each user. As system switches rapidly from one system to next, each user is given the impression that the entire computer system is being used by him,even though it is being shared among many users.
time sharing operating system is user interactive, but multiprogramming operating system need not be user interactive
MULTICS It was a main frame time-sharing operating system developed in the mid-1960's.
You can have more than one operating system installed on a computer at a time. Dual boot allows you the choose which system you want to use. With dual boot enabled, when you turn on your PC it will give you a choice of operating systems.
The two concepts build upon each other. A single tasking (ST) operating system is necessarily a single user (SU) operating system, but a single user operating system may be a multi-tasking (MT) operating system. For example, MS-DOS is a SU, ST operating system (there was only one "user" and only one program could run at a time), Microsoft Windows 3.1 was a SU, MT operating system (only one user could be logged in at a time, but multiple tasks could run at once), and Windows XP is a multiple user (MU), MT system, as multiple users could be logged in at once, and multiple tasks could be run at once. There is no known example of a MU, ST operating system.