2.2 types of computer software prepared by desmond c.s. wong
Post on 18-Dec-2015
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Operating System
An OS is a program (some may say a set of programs) that coordinates all the activities of a computer
2. The processor finds the ROM chip that contains the BIOS
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6. the system files and the #kernel of the OS load into RAM from hard disk/booting drive
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Functions of OS
User interface Job scheduling Program
management Single user/single
tasking Multitasking Multi-user Multiprocessing
Data management Device management Security of access Resources managem
ent Error detection and re
sponse
Types of OS
Standalone MS-DOS, Windows 9X, Windows NT Workstation, Wi
ndows 2000 Prof, Windows ME, Windows XP Home & Prof. Ed., MacOS
Network Netware, Windows NT and 2000 Server, Windows .N
ET Server, UNIX, Linux Embedded
Windows CE, Pocket PC 2002, Palm OS
Utility programs
A utility program is a type of system software that performs a specific task, usually related to managing a computer, its devices, or its programs
Applications software
Application software consists of programs that perform specific tasks for users Word processing Spreadsheet software Database software Presentation graphics software Game Desktop publishing software Anti-virus scanner Web browser and etc.
Forms of applications software
Packaged software Custom software Freeware Public domain software Shareware Software from ASP
Data files
Text document txt, rtf, doc, pdf
Image files bmp, gif, jpeg, png, tiff
Sound files midi, mp3, ra, wav
Video files avi, mov, mpeg, rm
Presentation files ppt
Spreadsheet files xls
Database files dbf, mdb
Relationship among OS, applications s/w and data files
UserApplication Software
Operating System
Data Files
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