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Forum Topic : What is System Software?
	Submitted by Curie on 23/06/2009 - 07:39 PM
	System software includes the operating system and all the utilities that enable the computer to function. Systems software includes compilers, loaders, linkers, and debuggers. Compilers : A program that translates source code into object code. The compiler derives its name from the way it works, looking at the entire piece of source code and collecting and reorganizing the instructions. Loaders : An operating system utility that copies programs from a storage device to main memory, where they can be executed. In addition to copying a program into main memory, the loader can also replace virtual addresses with physical addresses. Linkers : Also called link editor and binder, a linker is a program that combines object modules to form an executable program. Debuggers : A special program used to find errors (bugs) in other programs. A debugger allows a programmer to stop a program at any point and examine and change the values of variables.

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What are the classification for Operating System?
Submitted by Charles on 07/07/2009 - 07:27 PM
Thanks Curie, for the reply now tell me whether there is any classification for the operating system?.

	Reply
Classification for Operating System
Submitted by Curie on 07/07/2009 - 07:30 PM
Operating systems can be classified as follows: 1. Multi-user : Allows two or more users to run programs at the same time. Some operating systems permit hundreds or even thousands of concurrent users. 2. Multiprocessing : Supports running a program on more than one CPU. 3. Multitasking : Allows more than one program to run concurrently. 4. Multithreading : Allows different parts of a single program to run concurrently. 5. Real time: Responds to input instantly. General-purpose operating systems, such as DOS and UNIX, are not real-time.

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What is operating system?
Submitted by Charles on 07/07/2009 - 07:10 PM
Hi Curie, Tell me in detail what is operating system? how it makes system works?

	Reply
About Operating System
Submitted by Curie on 07/07/2009 - 07:23 PM
Operating System : 1. The most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs. 2. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. 3. Operating systems provide a software platform on top of which other programs, called application programs, can run. 4. For PCs, the most popular operating systems are DOS, OS/2, and Windows, but others are available, such as Linux.

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