sabheeta academy of computer science & information technology, hingorja what is computer?

Sabheeta Academy of Computer Science & Information Technology, Hingorja

What is Computer?


Defination:

Computer is an electronic machine which accepts data from user and after processing gives us output.

It performs two major functions, the Processing and Logical Decision Making.


Points:

Electronic Machine Accept Data Processing Decision Making Output


Features of Computer? Speed Storage Accuracy Reliability Diligence Versatility


Parts of Computer?


Four Essential Parts of Computer


Basic Function of a Computer??????

Input Processing OutputWe give our input with the help of input devices

Computer return our results through output devices.


Input Devices?

Keyboard Mouse Scanner Micro Phone Digital Camera Joystick Track Ball Touch Pad Light Pen


Keyboard??


Keyboard

It is an input device through which we give our data & instructions to computer by pressing its buttons, it has various type of keys.

Alphabetical Keys ( A to Z) Numerical Keys (0 to 9) Functional Keys (F1 to F12) Special Functional Keys (Alt, CTRL, Enter,

Arrow) etc


Mouse?


Mouse:

It is an Input Devices Through which we give our Instructions to computer by clicking its buttons (Left & Right), it also perform the dragging (Dreg & Drop)


Scanner??


Scanner:

It is an input Device through which we convert our hard copy document into soft copy document, It means we can insert our printed data into computer with the help of a Scanner.


Micro Phone


Micro Phone:

It is an input Device through which we record our sound in computer.


Digital Camera


Digital Camera

It is an input device through which we capture our pictures and than insert & edit in computer.


Track Ball


Track Ball

It is also an input device which is used on behalf of a mouse and perform same functions of a mouse, but used in Micro computers.


Touch Pad


Touch Pad

In Portable computers like Laptop Computer we use touch pad on behalf of a mouse, we move our finger on it to move the cursor.


Light Pen


Light Pen

It is used to write on the screen, in Touch Screen Monitors we use Light Pen to write some thing on behalf of a Keyboard.


Joystick


Joystick

It is a gaming device which we connect with our Computer to play any game, through Joystick we give instructions in playing games, that’s why it is also an input device.


Output devices

Through Output devices computer Communicate with its user.

The Devices through which we see results, or we get some thing in return of given data.


Output Devices?

Monitor Printer Speakers


Monitor/LCD (Liquid Crystal Display)


Monitor

It is an output device which display results on the screen, it is a soft copy output device shows the activities on screen which a computer is performing.


Printer


Printer

It is a hard copy output device which print our data permanently on the paper.

We can print any application, letter, CV or any other document on the paper with the help of a printer.


Speakers


Speakers

Speakers are also output device because when we play any music file they start producing sound.


What’s Next??

It’s the PROCESSING


Processing

Input

Data

Interface

bus

Data Cache

A.L.U

F.P.U

Registers

RegistersInstructions Cache

Instructions decoder

C.U

Output

M.U

1. A.L.U= Arithmetic & Logical Unit 2. F.P.U= Floating Point Unit 3. C.U= Control Unit 4. M.U Memory Unit


Types of Computer

Analog Digital Hybrid


Analog Computer

An analog computer is a form of computer that uses the continuously-changeable aspects of physical phenomena such as electrical, mechanical or hydraulic quantities to model the problem being solved.


Digital Computers

A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system.


Hybrid Computers

Hybrid computers are computers that contain features of analog computers and digital computers. The digital component normally serves as the controller and provides logical operations, while the analog component normally serves as a solver of differential equations.


Classification of Computers According to their Size Super Computer Mainframe Computer Mini/Server Computers Micro Computers 1. Personal Computer 2. Workstation Computer

Portable Computers 1. Laptop 2. Wearable 3. Palmtop OR PDA


Super Computer


Supercomputers are very fast in speed & are used for highly calculation tasks such as problems involving quantum physics, weather forecasting, climate research, molecular modeling (computing the structures and properties of chemical compounds, biological macromolecules and research into Nuclear weapons.


Mainframe Computers


Mainframe Computer

Mainframe Computers are multi-user & powerful computers used mainly by large organizations for critical applications, huge data processing.

such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing.

It works continuously and mostly used in Banking sector.


Mini/Server Computers


Mini/Server Computers

According to size it is in mid-range between Mainframe Computer and a personal Computer, it is used for web browsing and web hosting.

It is also a multi user computer.


Personal computer

Workstation Computer

Personal computer (PC)


Personal Computer

A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is operated directly by an end-user. It is used in homes, offices, schools, hospitals for documentation and mailing purpose.


Workstation Computer

workstations had offered higher performance than desktop computers, especially with respect to CPU and graphics, memory capacity and multitasking capability. They are optimized for the processing of different types of complex data such as 3D mechanical design, engineering simulation, animation and image processing.


Portable Computers

Laptop

PDA/Palmtop

Wearable


Laptop Computers

It is a small & portable computer involves the same features of a Personal Computer, but it is not a power hungry so it can be operated on rechargeable batteries.

It include a display, a keyboard, a pointing device (a touchpad) and speakers into a single unit.


Personal digital Assistant

A personal digital assistant (PDA), also known as a palmtop computer, or personal data

assistant, is a mobile device that functions as a personal information manager, it used to record a frequently repetitive data. Current PDAs often have the ability to connect to the Internet. Many PDAs employ touch screen technology.


Wearable Computer

Wearable computers are digital devices that are worn on the body. This type of wearable technology has been used in behavioral modeling, health monitoring systems and information technologies.

sabheeta academy of computer science & information technology, hingorja what is computer?

Documents

hingorja parts of computer

hingorja features of

hingorja scanner

hingorja mouse

help of input devices

essential parts of computer

hingorja keyboard

hingorja digital camera