The purpose of operating systemsPresentation Transcript
The Purpose Of Operating Systems By DAREK SZYMANSKI
What is Operating System? Operating System is set of programs that manage computer hardware resources and provide common services for application software. Operating system is most important types of system software in computer system. Operating system is set to do different functions and they are:
Recognise input form the keyboard
Send a output to computer screen
Keep track of the files and directories on a disc
Controlling an additional devices such as disc drives and printers
List of Operating Systems. Operating Systems can be classified as: Multiuser- Allow 1 or more users to run the programs at the same time. Some Operating Systems prevent hundreds or thousands of users. Multiprocessing- Supports running program on more the one CPU. Multitasking- Allow more the one program to be run concurrently. Multithreading- Allows different parts of programs to be run concurrently Real-time- Respond to input instantly.
Operating System Purpose Operating systems provide a software platform on top of which other programs, called application programs, can run. The application programs must be written to run on top of a particular operating system. For PCs, the most popular operating systems are DOS, OS/2, and Windows, but others are available, such as Linux.
Use and command for Operating System People normally interact with the operating system through a set of commands. For example, the DOS operating system contains commands such as COPY and RENAME for copying files and changing the names of files, respectively. The commands are accepted and performed by a part of the operating system called the command processor or command line interpreter. Graphical user interfaces allow people to enter commands by pointing and clicking at objects that appear on the screen