it means the capability of running various programs at a time. A single user cannont keep all the I/O devices busy in general. MultiProgramming increases the CPU utilization by organizing (code and the data) so that the cpu always have one to execute.
here let's say job 1 wants to take I/O the in Mutliprogramming what will happen is that.. while job1 is taking the i/o job2 will run and one's the job 1 is finish with I/O then job 1 will take back its's resources.
here in Multi Programming it makes sure that each and every resource is use affectly by the computer system , but their access is not provided to the user.
- here a CPU executes a multiple jobs by switching times.
- Here swithcing occurs so frequently that user can interact with each program while it is running.
- Time sharing requires an interactive computer system , which provides direct communication between the user and the system.
- A time sharing system allows many users to share the computer simultaneosuly.