When the computer starts, it starts the operating system that takes the control of the machine. An Operating System is a set of programs that help in controlling and managing the Hardware and the Software resources of a computer system. One type of operating system is DOS. The main functions of DOS are to manage disk files, allocate system resources according to the requirement. DOS provides features essential to control hardware devices such as Keyboard, …showed first 75 words of 1313 total…

…showed last 75 words of 1313 total…but it survives today in some special devices and is still used by some technicians and computer support. Reference: Jane Holcombe and Charles Holcombe (2003). "Survey of Operating Systems" (Chapter 2) California: Berkeley R & R Technologies, (2003) DOS 101. Feb. 1 2006 .http://www.rnrtech.com/techhelp/DOS101.html Wikipedia, (n.d.) MS-Dos Feb.2, 2006. http://en.wikipedia.org/wiki/MS-DOS DOS and the Command Prompt (2006) Class Handout Computer Hope (n.d,)DOS Feb. 3,2006 http://www.computerhope.com/ac.htm