20
1.3 The Components of a Computer
What is a hard disk?

Provides much greater storage capacity than a floppy disk
self-contained hard disk
removable hard disk
5
1.1 computer literacy Computers are valuable tools As technology advances and computers extend into every fact of daily living, it is essential you gain some level of computer literacy. To be successful in today’s world, you must have a knowledge and understanding of computers and their uses.
Define the term computer
Identify the components of a computer Explain why a computer is a powerful tool
Discuss the computers in everyday life
2
Computer Competency
Storage Device
• Records and retrieves
items to and from a storage medium
18
1.3 The Components of a Computer
What are common storage devices or drives?
CD-ROM or DVD-ROM drive ZIP® drive floppy disk drive
What are hardware and software?
Hardware
Electronic and mechanical equipment
Software
Instructions that tell hardware how to perform tasks
10
1.2 What Is a computer and What does it do ?
What is miniature storage media?

Portable, thin, credit card size memory Used in digital cameras and handheld computers
Memory card miniature storage media
21
1.3 The Components of a Computer
What is a compact disc?

Portable storage media • CD-ROM • CD-RW • DVD-ROM • DVD+RW
22
1.3 The Components of a Computer
CD-RW drive hard disk drive
19
1.3 The Components of a Computer
What is a floppy disk?

Thin, circular, flexible disk enclosed in rigid plastic A Zip® disk is a higher capacity disk
24
modem
1.4 Computer Software
What makes a computer powerful?
Storage Reliability
Speed
Accuracy
Communications
25
1.4 Computer Software
What is a computer program?
14
1.3 The Components of a Computer
What is the system unit?

Box-like device containing electronic components connected to motherboard Also called a chassis
6
1.2 What Is a computer and What does it do ? How is a computer defined?

Electronic machine operating under the control of instructions stored in its own memory • Accepts data • Manipulates data • Produces results • Stores results
The purpose of these lectures is to help you become competent in both computer English reading and computer-related skills.
• To understand the basic concepts and
CD-RW drive
Zip® drive hard disk drive (inside case)
CD-ROM or DVDROM drive
floppy disk drive
15
1.3 The Components of a Computer
What are two main components on the motherboard? Central Processing Unit (CPU)
第1 章 Introduction to Computers
2014年11月14日星期五
1
第1章 Introduction to
Computer
本章学习目的
Explain why it is important to be computer literate Differentiate among the various types of software Explain the purpose of a network Discuss the uses of the Internet and the World Wide Web Describe the categories of computers and their uses
• Also called a processor • Carries out instructions that tell
computer what to do
Memory
• Temporary holding place for data
and instructions
16
1.3 The Components of a Computer
7
1.2 What Is a computer and What does it do ? What are data and information?
Data
Raw facts, figures, and symbols
Information
Data that is organized, meaningful, and useful
What is the information processing cycle?
Input Process
Output Communication Storage
11
1.3 The Components of a Computer
What are common computer hardware components? monitor scaner
23
1.3 The Components of a Computer
What iБайду номын сангаас a communications device?

Establishes a connection between two computers using cable, telephone lines, and satellites One type is a modem
What is a chip?

Device with microscopic pathways that carry electrical currents Attaches to motherboard
Processor chip
Memory chip
17
1.3 The Components of a Computer
8
1.2 What Is a computer and What does it do ?
Who is a user?

Person who communicates with a computer or uses the information it generates
9
1.2 What Is a computer and What does it do ?
printer
speaker
System unit
keyboa rd
mouse
PC camera
12
1.3 The Components of a Computer
What is an input device?

Hardware used to enter data and instructions