Computer Operating Systems


Computer systems must be complemented by suitable software in order to be functional.


MS-DOS Microsoft-Disk Operating System is a group of programs used for management of hardware and software.


DOS will be loaded automatically into the memory from the hard disk when the computer is turned on. All users need DOS in order to communicate with the PC system to manage diskettes, programs, data and PC equipment or peripherals as it is used to coordinate and control the hardware and software operations in the computers. The user is required to type in the correct commands to execute the necessary tasks at the command or system prompt.
Examples : format, diskcopy, copy, dir, type, rename, erase, del.


How to recognise a file? Filename and Filename extension.

Example :
Project01 - Filename
.doc - Filename extension




Windows Graphical User Interface (GUI) - you work mainly by pointing at and clicking on the screen rather that by typing commands.

Windows Operating System is a standalone operating system without sitting on DOS.





Microsoft Office is a collection of programs or a suite of programs that work together and having similar interface of common features, menu choices, and screen display, so that you can customise applications to suit your needs, even though the programs accomplish entirely different goals.



Microsoft Applications Customisation :
Working and Sharing Data and Features

In Excel 2000, you can create a financial table in Word 2000 letter that you send by physical output or electronic mail. Otherwise, you can present in Powerpoint 2000 or as an interactive database system in Access 2000, or view as a web page with Internet Explorer, and hold regular schedules and meetings with Outlook 2000.


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