BASIC COMPUTER

BATRA COMPUTER CENTRE

Website: www.batracomputercentre.com Ph. No.: 9729666670, 0171-4000670

WHAT IS COMPUTER

Computer is a device that transforms data into meaningful information. Data can be anything like marks obtained by you in various subjects. It can also be name, age, sex, weight, height, etc. of all the students in a class.

Computer can also be defined in terms of functions it can perform. A computer can:I. accept dataII. store dataIII. process data as desired and IV. retrieve the stored data as and when required and V. print the result in desired format.

The major characteristics of a computer are high speed, accuracy, diligence, versatility and storage.

A personal computer (PC) is a small, relatively inexpensive computer designed for an individual user. In price, personal computers range anywhere from a few hundred dollars to thousands of dollars. All are based on the microprocessor technology that enables manufacturers to put an entire CPU on one chip.At home, the most popular use for personal computers is for playing games. Businesses use personal computers for word processing, accounting, desktop publishing, and for running spreadsheet and database management applications.

Mainframe computers (colloquially referred to as "big iron") are computers used primarily by large organizations for critical applications, bulk data processing, such as census, industry and consumer statistics, enterprise resource planning, and transaction processing.

A minicomputer is a type of computer that possesses most of the features and capabilities of a large computer but is smaller in physical size.

A minicomputer fills the space between the mainframe and microcomputer, and is smaller than the former but larger than the latter. Minicomputers are mainly used as small or midrange servers operating business and scientific applications. However, the use of the term minicomputer has diminished and has merged with servers. A minicomputer may also be called a mid-range computer.

A supercomputer is a computer that performs at or near the currently highest operational rate for computers.  Traditionally, supercomputers have been used for scientific and engineering applications that must handle very large databases or do a great amount of computation (or both). Although advances like multi-core processors and GPGPUs (general-purpose graphics processing units) have enabled powerful machines for personal use (see: desktop supercomputer, GPU supercomputer), by definition, a supercomputer is exceptional in terms of performance.

PARTS OF COMPUTER

Computer hardware is the physical parts or components of a computer, such as the monitor, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory (RAM),motherboard, and so on, all of which are tangible physical objects.

BLOCK DIAGAM OF COMPUTER

ESSENTIAL OF COMPUTER HARDWARE

STORAGE OR MEMORY UNIT

This unit can store instructions, data and intermediate results. This unit supplies information to the other units of the computer when needed. It is also known as internal storage unit or main memory or primary storage or Random access memory(RAM).

Its size affects speed, power and capability. Primary memory and secondary memory are two types of memories in the computer. Functions of memory unit are: It stores all the data and the instructions required for processing. It stores intermediate results of processing. It stores final results of processing before these results are released

to an output device All inputs and outputs are transmitted through main memory.

INPUT DEVICE

In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, digital cameras and joysticks.

OUTPUT DEVICES

An output device is any device used to send data from a computer to another device or user. Most computer data output that is meant for humans is in the form of audio or video. Thus, most output devices used by humans are in these categories. Examples include monitors, projectors, speakers, headphones and printers.

OPERATING SYSTEM

An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. The application programs make use of the operating system by making requests for services through a defined application program interface (API). In addition, users can interact directly with the operating system through a user interface such as a command line or a graphical user interface (GUI).

TYPES OF OPERATING SYSTEM

2. MOUSE1.KEYBOARD

EXAMPLES OF OPERATING SYSTEM

ANY QUERY

ADDRESS: SCO15, DAYAL BAGH, NEAR HANUMAN MANDIR, AMBALA CANTT- 133001 HARYANAPH. NO.: 9729666670, 0171-4000670Email : info.jatinbatra@gmail.comWebsite: www.batracomputercentre.com

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MS OFFICE 2010, 2013 [ Word, Excel, Power Point Point]

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C Programming Language Introduction

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150 PROGRAMS PRACTICALLY ON PC

C++ Programming Language

150 PROGRAMS PRACTICALLY ON PC

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