chap5 - Computer Science Department (CSD) Centre for...

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FOSEE, MULTIMEDIA UNIVERSITY (436821-T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~csd/ Computer Science Department (CSD) Centre for Foundation Studies and Extension Education (FOSEE) PCA 0015 Computer Applications Foundation in Engineering ONLINE NOTES Chapter 5 System Software
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PCA0015 Computer Applications Chapter 5 Objectives: Upon completion of this topic, the students should be able to: Discuss what software is. Describe the two kinds of system software. Describe the functions of an operating system. Describe the most widely used microcomputer operating systems. Describe the various types of utility programs. Software or programs , consists of the step-by-step instructions that tell the computer how to perform a task. Software can either be: Custom-written software - software made by computer specialist or programmer for a particular customer like banks, hospitals, airlines, military Packaged software - software designed to meet the needs of wide variety of users not just single user or company. Also known as "off-the-shelf" program (program that is available in stores or via mail/catalog) 5.1 Types of Software 5.1.1 System software Program that control the operation and resources of the computer and enables the user to interact with the computer hardware For example Windows 98, Windows XP. Two types of system software include: 1. Operating system : Is the principle piece of systems software in any computing system. 2. Utility programs : support, enhance, or expand existing programs in computer systems. 5.1.2 Application software Software that can perform useful works or specific tasks such as word processing, browsing etc. For example Microsoft Word, Adobe Photoshop, Netscape Communicator. CSD Lecturer 2/9
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PCA0015 Computer Applications Chapter 5 5.2 Operating System Operating System (OS) is a set of programs containing instructions that coordinate all the activities among computer hardware. Most OS perform similar functions such as starting the computer, providing user interface, managing programs and memory, configuring devices, scheduling jobs and providing housekeeping services. OS resides on the computer hard disk. On smaller handheld computers, the OS may reside on a ROM chip. Different size of computer typically uses different OS e.g. a mainframe doesn't use same OS as desktop. There are various types of OS and most of them are not compatible with each other i.e. the OS that runs on a PC will not run on Apple computer. In addition, application software that works with one OS may not work with another. OS that a computer uses sometime is called the platform . The term cross-platform refers to applications, formats, or devices that work on different OS. 5.3 Functions of Operating Systems
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chap5 - Computer Science Department (CSD) Centre for...

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