Operating System

batch system is Jobs with similar needs are batched together and run through the computer as a group, by an operator or automatic job sequencer. Performance is increased by attempting to keep CPU and I/O devices busy at all times through buffering, off-line operation, spooling, and multiprogramming. one in which jobs are bundled together with the instructions necessary to allow them to be processed without intervention.

multitasking is a method by which multiple tasks, also known as processes, share common processing resources such as a CPU In the case of a computer with a single CPU, only one task is said to be running at any point in time, meaning that the CPU is actively executing instructions for that task.

Time-sharing is sharing a computing resource among many users by multitasking.