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Answer

Multiprogramming is the allocation of more than one concurrent program on a computer system and its resources. Multiprogramming allows using the CPU effectively by allowing various users to use the CPU and I/O devices effectively. Multiprogramming makes sure that the CPU always has something to execute, thus increases the CPU utilization. On the other hand, Time sharing is the sharing of computing resources among several users at the same time. Since this will allow a large number of users to work in a single computer system at the same time, it would lower the cost of providing computing capabilities.

Time sharing, which was introduced in 1960s, is the sharing of computing resources among several users at the same time. In time sharing systems, several terminals are attached to a single dedicated server having its own CPU. Actions/commands executed by the operating system of a time sharing system have a very short time span. Therefore the CPU is assigned to users at the terminals for a short time period, thus a user in a terminal gets the feeling that she has a CPU dedicated to her behind her terminal. The short time period that a command is executed on a time sharing system is called a time slice or a time quantum. With the development of internet, time sharing systems have become more popular since expensive server farms could host a very large number of customers sharing the same resources. Since the websites operate mainly in bursts of activity followed by periods of idle time, the idling time of one customer could be used effectively by the other, without any of them noticing the delay.

Answer

In a time sharing system, there will be number of terminals connected to a central system. Where many users will be giving multiple process requests(multiprogramming) from various terminals. Then the central computer will process all these requests by sharing time between them.