Chapter 9, Problem 4.3E

Program Plan Intro

Operating System (OS):

• The most important program that runs on a computer is operating system.
• OS is the term that acts as an interface between the hardware and the user.
• OS does basic operations such as getting input from the keyboard, displaying output in the monitor and monitoring the files.
• It is responsible for the management to co-ordinate the zactivities on a computer system.
• The responsibilities of OS are bound to get higher when it comes to security, because it provides the access rights for users.

Mobile phone:

Mobile phones are the smaller electronic devices that are used for computation and also easily ported. They are of various types like E-book reader, Digital camera, Portable media player, PDA (Personal Digital Assistant) Multimedia players, Cell phone, PND (Personal Navigation Device) and many others.