VARIOUS TYPES OF OS STRATEGY :

Batch Operating System
- This strategy involves reading a series of jobs (called a batch) into the
machine and then executing the programs for each job in the batch. This
approach does not allow users to interact with programs while they operate.

Multiprogramming Operating System
- The ability to do more than one job is called multiprogramming. The system
separates the memory out into several pieces and lets each one of the pieces
be a different job that the computer was running. The ability to do multiprogramming
 speed the computers up tremendously.
-  When one job idled to wait for input or output, the operating system could
automatically switch to another job that was ready.

Distributed Operating System
- An operating system that manages a group of independent computers and
                     makes them appear to be a single computer
- Distributed computations are carried out on more than one machine
- When computers in a group work in cooperation, they make a distributed
                       system.