1 history computers

1

History of Computers

Module 1Section 1

2

What Is a Computer?

• An electronic machine, operating under the control of instructions stored in its own memory, that can accept data (input), manipulate data according to specified rules (process), produce results (output), and store the results for future use

http://avconline.avc.edu/abeyer/Web%20Slides/Chp1/img3.jpg

3

Definition of a Computer

• A computer is defined in the following ways– By the work it does– By the kind of information it handles– By its size and price

4

Categories of Computers

• Mainframes and PCs that run application software

• Embedded chips that control machines• Internet or cyberspace

5

Particulars are Moving Targets

• Technology advances at exponential rates– Computer memory capacity quadruples

every 3 years– Computer processor speed doubles every

3 years– Computer networks – number of hosts

double every year

• Principles are converging– What is good and moral?

6

Moore’s Law

• Chip’s transistor density doubles every 18 months at constant prices

• What does this mean?

7

Computer Networks

• Network – two or more connected computers

• Purpose - sharing or exchange of information and/or resources

• Benefits– Improved efficiency– Reduces need for travel…

8

Course Objectives

• Explore applications of computers in many areas

• Gain increased awareness of impact of computer technology on society

9

Course Focus

• Benefits offered by computer technology

• Problems posed by computer technology

• Hardware and software systems that make it possible

• Future of computers in society

10

Computers and Networks

• Facilitate– Concentration of knowledge and control– Distribution of knowledge and control

• Have the power to– Amass and interrogate enormous

volumes of data– Process data at enormous rates for real

systems and simulations

11

Computers and NetworksChallenge:

• Constitutional definitions• Social structures• Lifestyle options

12

References

Definition of computerhttp://www.google.com/search?q=define:computer

History of computerhttp://www.computerhistory.org/timeline/http://www.pbs.org/nerds/timeline/

Computer Lawshttp://www.sysprog.net/quotlaws.html