Classification of operating systems
The operating systems may be classified into different types depending upon the nature of interaction between the user and his/her program. The various types of operating system are :
1. single user operating system
2. Multi user operating system
3. Batch processing operating system
4. Multi programming operating system
5. Multi tasking operating system
6. Multiprocessing operating system
7. Time sharing operating system
Multi threading operating system
Single user operating system
· In single user operating system, a single user can access the computer at a particular time.
· The computer, that are based on the operating system have only single processor and execute only a single program at all the time
· Single user is of two type :
1. single user, single-tasking operating system.
2. Single user, multi-tasking operating system
· Single user, single tasking operating system: the single user, single tasking operating system allows a single user to execute one program at a particular time. for example MS-dos and palm OS for palm handheld computer are single user single tasking OS
· Single user, multi tasking operating system: the single user, multitasking operating system allows a single user to execute multi programs at a same time. For example, a user can perform different tasks such as making calculation in excel sheet, printing a word document and download a file from the internet at the same time .
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