lesson 1. An Overview of the Computer System. This lesson includes the following sections: The Parts of a Computer System Looking Inside the Machine Software: Bringing the Machine to Life. The Parts of a Computer System. What is a Computer? Hardware Software Data Users.
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- What is a Computer?
A computer is an electronic device used to process data.
The Parts of a Computer System - Hardware
The Parts of a Computer System - Software
Numbers above 9
use more than 1 digit
Types of Hardware
A computer's hardware devices are categorized as follows:
Looking Inside the Machine - The CPU
Looking Inside the Machine - Memory
– How Memory is Measured
Unit Approx. Value Actual Value
Kilobyte (KB) 1,000 1,024
Megabyte (MB) 1,000,000 1,048,576
Gigabyte (GB) 1,000,000,000 1,073,741,824
Terabyte (TB) 1,000,000,000,000 1,099,511,627,776
Input and Output Devices
Looking Inside the Machine - Storage Devices
What is Software?
Bringing the Machine to Life - Applications
Word processing programs Spreadsheet software
Database management Presentation programs
Graphics programs Networking software
Web design tools and browsers Internet applications
Communications programs Utilities
Entertainment and education Multimedia authoring