Operating
System
Operating system is a controlling Program of the computer. The operating controls the Computer. A Computer cannot communicate with you itself. It needs a medium for it and that medium is the operating system. Thus an operating System is a set or collection of some Programs.
Thus we can say that the operating system controls all the devices of a Computer. The operating system is also called Master control Program.
Types of Operating System
Single user System
A single user operating System is that which executes one program at a time. Earlier, most operating system was single user and even in almost all the modern micro computers are also single user systems.
The problem with this system is that it is not possible to activate more than one program at a time. It’s why the programs are arranged in a line in this system.
- Single user System
- Multi Programming
- Multi Processing
- Batch Processing
Single user System
A single user operating System is that which executes one program at a time. Earlier, most operating system was single user and even in almost all the modern micro computers are also single user systems.
The problem with this system is that it is not possible to activate more than one program at a time. It’s why the programs are arranged in a line in this system.
Multi Programming
Now-a-days so many operating systems give the facility to performing several tasks at a time. This is called multi Programming. In others words, the execution of two or more than two programs by one Computer at a time is called multi programming.
Now-a-days so many operating systems give the facility to performing several tasks at a time. This is called multi Programming. In others words, the execution of two or more than two programs by one Computer at a time is called multi programming.
Multi Processing
The use of the word multi processing is to clarify the processing view where two or more processors are linked to each other. In such systems the commands of different and independent programs are controlled by a single processor at a time or the execution of different commands is done one by one by the processors which have been received from a single program.
Thus we can say that multiprocessing is used in two computers attached to each other which have more than two CPU’s and which have the capacity to execution different programs at a time.
The use of the word multi processing is to clarify the processing view where two or more processors are linked to each other. In such systems the commands of different and independent programs are controlled by a single processor at a time or the execution of different commands is done one by one by the processors which have been received from a single program.
Thus we can say that multiprocessing is used in two computers attached to each other which have more than two CPU’s and which have the capacity to execution different programs at a time.
Batch Processing
This is a very old method which can execute various programs and is used to execute the task on various data processing centers. In such operating system very user prepares his programs offline and deposits it on data processing center when completed and the computer operator collects all such. Programs the batch of programs, he load it in the computer and the execute them one, by one, batch processing is also called serial, sequential, offline and stacked job processing.
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