1. Jan Smith Computer Concepts and Applications
Chap. 1 & 2 - Overview, Apps
Jan Smith
Computer Concepts and Applications
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2. Covering:
Review of chapter 1 - Overview

3. A computer is an electronic device that:
Chapter 1 - Overview
A computer is an electronic device that:
a. operates under the control of memory unit
b. accepts data
c. processes data
d. produces output
e. stores the results for use later

4. Chapter 1 - Overview Information Processing Cycle b. accepts data
c. processes data
d. produces output
e. stores the results for use later
Information Processing Cycle
Input
Processing
Output
Storage

5. Why is a computer powerful?
Speed billions of actions per second
Reliability failures usually human error
Storage keeps huge amounts of data

6. Categories of Computers
Personal or micro
Mini
Main Frame
Super

7. Categories of Computers
Personal = micro
Portable Types: Hand-held Palmtop Notebook Sub-notebook Laptop Pen
Desktop
Tower
Workstations

8. Categories of Computers
Servers
(how it’s used more than what it is)
Designed to support a computer network
More powerful
Larger memory
Larger storage capacity
High speed communications

9. Categories of Computers
Minicomputers
Originally for specific tasks, like engineering calculations
Main frame
Large systems for hundreds of users
Requires special environment

10. Categories of Computers
Supercomputers
Most powerful category
Used for weather forecasting, engineering design and testing, serious decryption
Cost several million dollars