computer component

CPU
Central Processing Unit, or "brains" of the computer.

Monitor
An output display device (looks similar to a TV) in a computer system.  You see information on the monitor's screen.

RAM

RAM is usally refferer to as a computer "memory" meaning that is stories information that is used by running programs and application

Hard disk drive

The hard disk drive of the computer is where permanent information is stored. Documents, databeses, spreadsheet and programs are all shared in the hard disk. The larger the hard disk the more you can fit on the drive.

Keyboard
Input device - choose letters, symbols, and actions by pressing keys

Mouse
A hand-held input device you roll on your desk to point to and select items on your screen. When you move the mouse, the mouse pointer on the screen moves in the same direction.

computer of classification

Computer Of Classification

Until recently computers were classifieds as microcomputers, super minicomputers, mainframes, and supercomputers. Technology, however, has changed and this classification is no more relevant. Today all computers used microprocessors as their CPU. Thus classification is possible only through their mode of use. Based on mode of use we can classify computers as Palms, Laptop PCs, Desktop PCs and Workstations. Based on interconnected computers we can classify computers we can classify them as distributed computers and parallel computersWith miniaturization and high-density packing of transistor on a chip, computers with capabilities nearly that of PCs which can be held in a palm have emerged. Palm accept handwritten inputs using an electronic pen which can be used to write on a Palm’s screen (besides a tiny keyboard), have small disk storage and can be connected to a wireless network. One has to train the system on the user’s handwriting before it can be used as a mobile phone, Fax, and e-mail machine. A version of Microsoft operating system called Windows-CE is available for Palm.An Indian initiative to meet the needs of rural population of developing countries is called Simputer. Simputer is a mobile handheld computer with input through icons on a touch sensitive overly on the LCD display panel. A unique feature of Simputer is the use of free open source OS called GNU/Linux. The cost of ownership is thus low as there is no software cost for OS. Another unique feature of Simputer not found in Palm, is a smart card reader/writer, which increases the functionality of the Simputer including possibility of personalization of a single Simputer for several users.

computer history and genaration

FIRST GENERATION (1940~1946) :  VACUUM TUBES FOR CIRCUITRY AND MAGNETIC

DRUMS FOR MEMORY, ITS VERY EXPENSIVE TO OPERATE AND USING A LOT OF ELECTRICITY.

SECOND GENERATION (1956~1963) :  TRANSISTORS, IT WAS INVENTED IN 1947 BUT DID NOT BECOME FAMOUS UNTIL 1950'S. IT ALLOW COMPUTER TO BECOME MUCH FASTER AND CHEAPER BUT STILL RELIED ON PUNCHED CARD FOR INPUT AND PRINTOUT OUTPUT.

THIRD GENERATION (1964~1971) : INTEGRATED CIRCUITS, IT WAS MINIATURIZED AND PLACED ON SILICON CHIP CALLED SEMICONDUCTORS. INTERACTED THROUGH KEYBOARDS AND MONITORS AND INTERFACED WITH AN OPERATING SYSTEM THAT ALLOW DIFFERENT APPLICATION AT ONE TIME WITH A CENTRAL PROGRAM. ITS WAS SMALLER AND CHEAPER THAN THEIR PREDECESSORS.

FOURTH GENERATION ( 1971~PRESENT) : MICROPROCESSOR, THOUSAND OF INTEGRATED CIRCUITS WERE BUILT ONTO A SINGLE SILICON CHIP. ALL OF THE COMPONENTS FROM THE CENTRAL PROCESSING UNIT TO OUTPUT/INPUT CONTROLS ON A SINGLE CHIP.

FIFTH GENERATION (PRESENT AND BEYOND) : ARTIFICIAL INTELLIGENCE, IT IS STILL IN DEVELOPMENT, ITS GOAL IS TO DEVELOP DEVICES THAT RESPOND TO NATURAL LANGUAGE INPUT AND CAPABLE OF LEARNING AND SELF-ORGANIZATION.