What is computer ?
> A computer is electronic device. It has the ability to store, retrieve, and process data. You can use a computer to type documents, send email, browse that web, and can also use it to handle spreadsheets, accounting,database management, presentations, and more.
Computing history and computer generations ?
Computing history.....
>supercomputers
Means the data processing machine is capable of processing high. Built specifically for the science of complex processing requirements. And need high-speed projectiles such research. Satellite Communication Or forecasts, etc.
>Mainframes
Refers to the information processing speed, memory and less. Of supercomputers Use of data and commands of different model family (Family) the same without any modification. Working in a network (Network) as well. Can be connected to a device called. Terminal (Terminal), many have to work multiple jobs (Multi Tasking) and use it to several people (Multi User) example of the mainframe, it is widely used. Bank's computer connected to the ATM and bank branches across the country. '
>Minicomputer
Agencies and a small mainframe computer, which does not need to be expensive. Computer manufacturers have developed a computer that is smaller and cheaper machine called a minicomputer. The effects of working with entrepreneurs around with high speed. Using a magnetic capacity of hard disks (Harddisk) in data storage. Can read and write data quickly. Agency and companies use computers now include university departments, shopping malls, hotels, hospitals and industrial facilities.
>microcomputer
Refers to a small data processing. The memory and speed of processing is minimal. Can be used by one person. It is often called Personal computers (Personal Computer: PC)Microcomputer Classified into two major categories.
>The installation work on the desk top.
>Portable Can portable Residential electric power from an external battery. Most often referred to by the nature of the work that Laptop Computer or Notebook Computer.computer generations.
Computer model.....
>Season 1 (1940-1956) vacuum tube.
>Season 2 (1956-1963) transistors.
>Season 3 (1964-1971) integrated circuits.
>Season 4 (1971-present) microprocessor.
Categories of computers
1. Microcomputer
2. engineering workstation
3. mini computer
4.mainframe computer
5. super computer
Why is a computer so powerful?
Meet the needs of users to have the most productive.