进入21世纪,尤其随着我国加入WTO信息产业的国际竞争将更加激烈。我国信息产业虽然在20世纪末取得了迅猛发展,但与发达**相比,甚至与印度、爱尔兰等**相比,还有很大的差距。**信息化的发展速度和信息产业的国际竞争能力,*终都将取决于信息科学技术人才的质量和数量。引进国外信息科学和技术**教材,在有条件的学校推动开展英语授课或双语教学,是教育部为加块培养大批高质量的信息技术人才采取的一项重要举措。

1 Introduction
The phrase "computer science"has a very broad Meaning today.However,in this book,we define phrase as "issues related to the computer".this introductory chapter first tries to find out what a computer is and then discovers other issues directly related to computer-s.We look at the computer as a black box and try to guess its behavior .
We then try to penetrate this box to uncover what is common to every com-
puter.This leads to the vom Neumann Model,which is universally accepted as the basis of the computer .We then briefly discuss the ramifications and issues of accepting the von Neumann model.At this time,we referto the chapter or chapters in the text that pertain to these issues.The chapter ends with a brief history of this culturechanging device:the com-puter.
……

PART I COMPUTER AND DATA 1
Chapter 1 Introduction 2
1.1 The Computer as a Black Box
1.2 von Neumann Model
1.3 Computer Hardware
1.4 Data
1.5 Computer Software
1.6 History
1.7 Key Terms
1.8 Summary
1.9 Practice Set
Chapter 2 Data Representation
2.1 ata Types
2.2 Data inside the Computer
2.3 Representing data
2.4 Hexadecimal Notation
2.5 Octal Notation
2.6 Key Terms
2.7 Summary
2.8 Practice Set
Chapter 3 Number Representation
3.1 Desimal and Binary
3.2 Conversion
3.3 Lnteger Representation
3.4 Excess System
3.5 Floating-Representation
3.6 Hexadecimal Notation
3.7 Key Terms
3.8 Summary
3.9 Practice Set
Chapter 4 Operations On Bits
4.1 Arithmetic Operations
4.2 Logical Operations
4.3 Shift Operations
4.4 Key Terms
4.5 Summary
4.6 Practice Set
PART II COMPUTER HARDWARE
Chapter 5 Computer Organization
5.1 Central Processing Unit(CPU)
5.2 Main Memory
5.3 Input/Output
5.4 Subsystem Interconnection
5.5 Program Execution
5.6 Two Different Architectures
5.7 Key Terms
5.8 Summary
5.9 Practice Set
Chapter 6 Computer Networks
6.1 Networks,Large and Small
6.2 OSI Model
6.3 Categoies of Networks
6.4 Connecting Devices
6.5 The Internet and TCP/IP
6.6 Key Terms
6.7 SUmmary
6.8 practice Set
PART III COMPUTER SOFTWARE
Chapter 7 Operating Systems
7.1 Definition
7.2 Evolution
7.3 Compunents
7.4 Popular Operating Systens
7.5 Key Terms
7.6 SUmmary
7.7 Practice Set
Chapter 8 Algorithms
8.1 Concept
8.2 Three Constructs
8.3 Algorithm Representation
8.4 More Formal Definition
8.5 Subalgorithms
8.6 Basic Algorithms
8.7 Recursion
8.8 Key Terms
8.9 Summary
8.10 Practice Set
Chapter 9 Programming Languages
9.1 Evolution
9.2 Building a Program
9.3 Program Execution
9.4 Categories of Languages
9.5 A Procedural :anguage:C
9.6 Key Terms
9.7 Summary
9.8 Practice Set
Chapter 10 Software Engineering
10.1 Software Life Cycle
10.2 Development Process Models
10.3 Modularity
10.4 Quality
10.5 Documentation
10.6 Key Terms
10.7 Summary
10.8 Practice Set
PART IV DATA ORGANIZATION
Chapter 11 Data Structures
11.1 Arrays
11.2 Resords
11.3 Linked Lists
11.4 Key Terms
11.5 Summary
11.6 Practice Set
Chapter 12 Abstract Data Types
12.1 Background
12.2 Linear Lists
12.3 Stacks
12.4 Queues
12.5 Trees
12.6 Binary Trees
12.7 Graphs
12.8 Key Terms
12.9 Summary
12.10 Practice Set
Chapter 13 File Structuers
13.1 Acdess Methods
13.2 Sequential Files
13.3 Indexed Files
13.4 Hashed Files
13.5 Text versus Binary
13.6 Key Terms
13.7 Summary
13.8 Practice Set
Chapter 14 Databases
14.1 Database Management System
14.2 Auchitecture
14.3 Database Models
14.4 Relatioang Model
14.5 Operations Relations
14.6 Structured Query Language
14.7 Other Database Models
14.8 Key Terms
14.9 Summary
14.10 Practice Set
PART V ADVANCED TOPICS
Chapter 15 Data Compression
15.1 Lossless Compression
15.2 Lossy Compression Methods
15.3 Key Terms
15.4 Summary
15.5 Practice Set
Chapter 16 Security
16.1 Privacy
16.2 Digital Signature
16.3 Key Terms
16.4 Summary
16.5 Practice Set
Chapter 17 Theory Computation
17.1 Simple Languge
17.2 turing Machine
17.3 Godel Numbers
17.4 Halting Problem
17.5 Solvable and Unsolvable Problems
17.6 Key Terms
17.7 Summary
17.8 practic Set

Welcome to computer science!
From writing reports to creating special effects in movies to esplor-
ing the final frontier of space,computers play vital roles in our lives
and world.You're about to start the exploration adn exciting world of computer sciencean arena that offers many challenging and excitingcareer-
s.
In this introductory text,you'll get a taste of each of the many dis-ciplines within computer science.Data representation of text,audio,images,and numbers;computer hardware.including operating systems and programming languages;data organiztion topics such as SQL da-tabase models-they're all here.Progressing from the bits and bytes level
to the higher levels of abstraction and otherareas in the computer field
And to ensure that the oveuview ia as clear as possible,the author offer-s guidance along the way,thuough:
.An emphasis on concepts rather than om mathematical and technical
models and technical details.
.Numerous graphs,chats and illustrations that enhance and support wh-at you read adn make it easier to grasp the material.
.Examples that demonstrate concepts and the related mathematical mod-els.
.Key terms,summary,and eercises that aid study and allow you to test
your understanding.
.Complete chapters on networking,operating systems,somputer organiza-tion,and more.
For your learning solutions;www.thomsonleamingasia.com.