System processors

Single - user OS a single user OS is a system designed for use on a computer that will allow a single user at a time.

Multi - user OS, simular to the single user OS, the multi user OS allows multiple user to access and operate the system at any given time.

Batch Processing is a technique that uses a single program to process many individual jobs, tasks, or requests.

Real Time is an OS that guarantees a certain capability within a specified time period.