computer presentation

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Muhammad Aakib Ali

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Definition of ComputerDefinition of Computer

A computer is a machine that accepts data (in digital form) and manipulates it for some result based on a program (sequence of instructions) which describes how data is to be manipulated or processed.

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History of ComputerHistory of Computer

Computer is normally made for calculation work. Before the invention of the computer many other devices were used for calculations. These are: Abacus Napier Bones Pacaline (Pascal’s Calculator) Arthmetical Replica The Analytical and Differential Engine

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Atanasoff and Berry invented the first ever digital computer. It is called ABC.

The first large scale electronic digital computer was named ENIAC (Electronic Numerical Integrator and Computer). It contained 13000 vacuum tubes. It became operational in 1964.

Somewhere near 1964, a Hungarian born mathematician built a more efficient computer called EDVAC (Electronic Discrete Variable Automatic Computer).

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In 1985, the second generation of computers evolved by discarding the use of vacuum tubes and introducing transistors.

On 7 April, 1964 IBM announced the system 360. It consisted of six computer, all compatible with 40 different input / output and auxiliary storage devices.

Back in 80s, the first PC (Personal Computer) came on market.

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Types of ComputersTypes of Computers

Super Computers Main Frame Mini Computers Micro Computers Laptop Computers

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Components of Components of ComputerComputer

System UnitSystem Unit

Box-like device containing electronic components connected to motherboard.

MonitorMonitor

A computer display monitor, usually called simply a monitor, is a piece of electrical equipment which displays viewable images generated by a computer without producing a permanent record.

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Components of Components of ComputerComputerCentral Processing Unit (CPU)Central Processing Unit (CPU)

The CPU is the brains of the computer. Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place. In terms of computing power, the CPU is the most important element of a computer system.

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Components of Components of ComputerComputerRAMRAM

Random access memory (usually known by its acronym, RAM) is a type of computer data storage. It takes the form of integrated circuits that allow the stored data to be accessed in any order — that is, at random and without the physical movement of the storage medium or a physical reading head. RAM is a volatile memory as the information or instructions stored in it will be lost if the power is switched off.

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Key BoardKey BoardAn input device similar to a typewriter, for the entry of text, numbers and punctuation.

MouseMouseA mouse is a small device that a computer user pushes across a desk surface in order to point to a place on a display screen and to select one or more objects.

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Components of Components of ComputerComputerHard DiskHard Disk

A mass storage media for digital information used in computers, video and audio. In contrast to a floppy disk, the Hard Disk is usually non-removable (though there are already some removable and transportable Hard Disks).

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Floppy DiskFloppy DiskCompact DiskCompact Disk

A floppy disk is a data storage device that is composed of a disk of thin, flexible ("floppy") magnetic storage medium encased in a square or rectangular plastic shell.

A Compact Disc is an optical disc used to store digital data, originally developed for storing digital audio.

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Components of Components of ComputerComputerPrinter & ScannerPrinter & Scanner

In computers, a printer is a device that accepts text and graphic output from a computer and transfers the information to paper

A scanner is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display

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Components of Components of ComputerComputerJoy StickJoy Stick

Joy stick is used for playing games on a computer

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Components of Components of ComputerComputerSpeakerSpeaker

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How Computer WorksHow Computer Works

DataDataThis is the raw input with which the computer manipulates to produce some result

InputInputThe data that we feed into the computer is called the Input

ProcessingProcessingWhen the computer manipulates the data for producing some required result, it is called processing

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How the Computer How the Computer WorksWorks

Output Output Result that is obtained after processing the data, is called output.

The data given to the computer stays in the memory. The microprocessor processes the data. This the output is produced. Various devices are involved in the whole process. The Keyboard and mouse are both input devices. The monitor and printer are both output devices and microprocessor acts as the brain of the computer.

computer presentation

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