Basic Concepts Of Computer

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Device Classification

Input Devices

Output Devices

Processing Devices

Memory Devices

Storage Devices

Device Classification

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An input device is an electromechanical device that accepts data from outside world and translates them into a form a computer can interpret.

Some input devices are-• Keyboard devices• Point- and -draw devices• Data scanning devices• Electronic card based devices• Speech Recognition devices• Vision based devices

Input Devices

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Input Devices

Keyboard and Mouse

Webcams and Cameras

Microphones

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Figure 4.9 Banks use magnetic-ink character recognition (MICR) to automate their input procedures.

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OutputDevices

Headphones

Printers

Monitors

Speakers

Processing Devices

CPU Device Dual Core CPU Device

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Memory Devices

RAM

ROMCache Memory

Storage Devices

USB Memory Key CD’s

Floppy Disc

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Software Classification

Application Software System Software Computer software, or just software, is a

collection of computer program that provide the instructions for telling a computer what to do and how to do it.

Software Classification

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Application Software

Microsoft Word

Microsoft Excel Microsoft Access

Microsoft PowerPoint

System Software

Computer Classification

Personal Computers Workstation Mainframe & Supercomputers Laptops PDA/Pocket PC

Computer Classification

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Personal Computers

Workstation- are powerful computer designed to meet computing needs of engineers, architects and other professionals who need greater processing power, larger storage.

Mainframe & Supercomputers

PDA & Handheld Computers

Smartphone

Same as PCs in functionality More Compact, Portable Less Power requirement, operated on

battery/s Less capacity compared to PCs Maintenance and actually are costlier

compared to PCs

Laptops

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