1. What is a computer?

A computer is a program machine that carried out what it has been instuctured to do.

     2. Generation of computer:

a). Pre computer and early computer ( before 1940s): Abucus

ENIAC

a). The first generation (1940 - 1950): Vacuum Tube


• first electric computer used vacuum tube, they was huge and complex. The first general purpose computer was the ENIAC  (Electronic Numerical Integrator And Computer) in 1945. It took up 167 square meters, weighed 27 tons, and consuming 150 kilowatts of power. it used by US Army to calculate and Design Hydrogen.

• The other similar with this computer  of this era included german Z3, ten British Colossus computers, LEO, Harvard Mark I, and UNIVAC. UNIVAC used in 1950.

b). The second generation (1950 - 1964): Transistors.

• The vacuum tubes have been placed by transistors. Most the computer used IBM 1401
• This is a computer that has high level language such as COBOL, FORTRAN.

c). The third generation (1964 - 1974): Integrated circuit (IC)
combine thousands of transitor, entire circur on one computer.
d). The fourth generation (1974 - present): VLSI/ ULSI
e). The fifth generation ( now and future): 
Base on artificial intelligence.

  3. Categories of computer: depend on size, capa,..

• embedded computer: mini computer into a specific product for a specific purpose such as DVD, washing machine,...
• Mobile computer:
• Pesonal computer: is a copmuter using for a single user at a time.
• Midrange:
• Mainframe:  is expensive, very powerful computer that can handle hundreds or thousand of connected users simultaneously.

Ex: use for company to control all computer in that company.

• super computer: the fastest, most powerful, most expensive computer. Use for complex computation and processing.

Information management is a general terms that refers to managing any kind of information.
IM is the collection and then manage that all of information.
We have many terms of information such as:

• Web content management (CM)
• Document management (DM)
• Records management  (RM)
• Digital asset management (DAM)
• Learning management system (LM)
• Learning content management system (LCM)

However, IM can encompasses to technology, process, content and people
This week, in my class had to divide into group to present about problem with IM and their solution.
So, i will show to everyone see our project.

I- DATA AND INFORMATION.
1- Definition of data and information
Data is a raw facts. Data can be used in the form of number, characters, symbols, picture or sounds.
Information is data that is organized and meaningful. It's used for making decision.
Data is used as input for processing and information is used as output of the processing.
Ex: Data: words, images, numbers.
      Information: purpose, meaning process.
2- Data integrity.
Garbage in, garbage out ( GIGO) computer phrase that means you can't create correct information for incorrect data.

3- Quality of valuable information.

4- Role of information.
Information is used in decision making, to influence and persuade.
Information can be a capital resource, especially for companies that produce information-based products and services.
II- THE ECONOMIC OF INFORMATION AND IT
1- The economic of information and IT.
information has two basic elements.
Reach means the number of people.
Richness means amount of quality  information share in transaction. It has three component: bandwith, customization and interactivity.
How do computer represent data? A bit is the most basic unit of information in a computer. they are 0 and 

2- Computer operations.
A computer converts data ( from input ) to become information ( as output).
Basic operation that a computer can perform are input, processing, output, storage and communication.
3- Explain the economic of information

Now, no such tradeoff is required. Everyone is able to have incredibly rich communication with everyone else BECAUSE  of

  - Connectivity: the Internet,

   - Standards: Web standards, Internet standards, Application Standards, Database  standards, etc. 
4- What is input?
is any data and instructions entered into the memory of a computer – can be in the form of programs or commands, and user responses
5- What is output?
Output is an data that has been processed into a useful form.
Output device is any kind of hardware component that conveys information to one or more people.