Principles of Information Systems ...

12th Edition
Ralph Stair + 1 other
Publisher: Cengage Learning
ISBN: 9781285867168



Principles of Information Systems ...

12th Edition
Ralph Stair + 1 other
Publisher: Cengage Learning
ISBN: 9781285867168
Chapter 3, Problem 1WE
Textbook Problem

Do research on the Web to learn more about Apple’s decision to withdraw from the EPEAT program and why it later reversed that decision. Write a one-page report summarizing your findings.

Program Plan Intro

Components of computer:

Computer has four major components, they are:

  • Central processing unit (CPU)
  • Memory unit
  • Input devices
  • Output devices

Central Processing Unit (CPU):

  • CPU plays the key role in a computer by carrying out instructions of a computer program.
  • It performs all the basic logic, arithmetic, controlling and input/output operations that are specified by the instructions.
  • The CPU comprises of two units, Arithmetic logic unit (ALU) and control unit (CU).

Memory unit:

  • Once computer program instructions set are transformed into machine code by CPU, the machine code is stored in memory.
  • Then the CPU fetches the required data and instructions from memory and performs the required operations and then sends the result and next instructions set back to memory.

Input devices:

  • The devices used by the user to feed information to the computer, such as a hard drive, keyboard, or a networking card.
  • These devices get the data from outside world into the computer in the way that human eyes and ears bring the data to brain.

Output devices:

  • Output devices are used by computer to deliver information to user, such as a monitor, printer, and speaker.
  • The CPU takes the machine code present in memory and converts it into a format that is mandatory by monitor’s hardware.
  • Then the monitor’s hardware converts that information into different light intensities so that you see words or pictures.

Explanation of Solution

Apple’s decision to withdraw from EPEAT program:

  • The Apple felt that EPEAT is too narrow in its scope.
  • It does not track removal of toxic materials or energy efficiency.
  • It doesn’t certify smartphones or tablets that are Apple’s largest revenue streams.
  • A new environmental policy was been unveiled by then CEO to customers as well as shareholders...

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Chapter 3 Solutions

Principles of Information Systems (MindTap Course List)
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