Introduction To Computing Systems
Introduction To Computing Systems
3rd Edition
ISBN: 9781260150537
Author: PATT, Yale N., Patel, Sanjay J.
Publisher: Mcgraw-hill,
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Chapter 4, Problem 2E
Program Plan Intro

Memory

  • The computer memory is used for storing program instructions and data.
  • The two main commonly used types of memories are Random Access Memory (RAM) and Read Only Memory (ROM).
  • RAM stores data and the general purpose programs that are executed by the machine.
  • It is temporary and the contents can be changed at any time and the contents can be erased when the power is turned off.
  • ROM on the other hand is permanent and is used for storing initial boot up instructions of the machine.

Processing unit

  • The Central Processing Unit (CPU) is considered as the heart of the computing system.
  • It includes three main components that is the Control Unit (CU), one or more Arithmetic Logic Units (ALUs) and various registers.
  • A CPU that is implemented on a single chip is known as microprocessor.
  • Hence a processing unit is mainly used for computation and processing of information.

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