Sorry all friends some months a was Bessy some important personal work and now i am back so good morning all of you. 


Computer is a electrical machine and in every person is used computer today because computer has maintain all type of work who is need in daily working in different type field.and now every person is depend on computer because maximum work is completed on computer and there are  maintain different type work so friends i talk with you about computer.

Touch Screen

Touch Screen :-

A touch screen is  a touch sensitive display,where you interact with the device by touching areas of the screen with your finger.as a lot of arm movement is required while using this system,you do not enter large amounts of data into touch screens. instead, you touch words,pictures,numbers or locations identified on the screen.for the convenience of users,many ATM machines have touch screen so that you can easily access your bank account.some notebook computer also have touch screens.and Tab late computer is  also have touch screen.

Notebook Computer

 Notebook Computer(Laptop) :-

 A notebook computer is  also called a Laptop.A notebook is a small,lightweight computer that you can easily transport from one place to another. Most Laptop computer run either on batteries or a standard power supply. Notebook computer have the same capabilities as a full-size computer,although notebook computers are more expensive.

Full form of some important word.

CPU- Central Processing Unit.
TFT- Thin Film Transistor.
CRT- Cathord ray tube.
LED-Liquid Crystal display .
RAM-Random Access Memory.
ROM- Read Only Memory.

personal computer

A personal computer or PC is a computer designed to meet the needs of a n individual and usually refers to IBM-compatible computers.it can perform  all of the input,processing,output and storage acticvities by itself.
it contains at least one input device(keyboard),one output  device(monitor), one storage device(hard disk), memory and a processor. the processor.sometimes called a microprocessor ,is a central processing unit (CPU) on a single chip and is the basic building block of a PC. personal computer are found in most of the business places and are also popular for home use.

Types of Computer According to Size.

According to Size there are mainly five tpes of computer.

1:- Mainframe Computer :- Mainframe computer is big size computer and 100-110 terminal (keyboard+monitor) connected in One computer.and is so costly  so only big all companies can purchase mainframe computer.

2:- Mini Computer :- In Mini computer we can  connect 10-12 terminal. and 10-12 person can do work on mini computer at a time.

3:- Micro Computer :- In  micro computer we can connect only one terminal and one person can do work on micro computer at a time.

4:- Personal Computer :- Personal computer is a common computer of today. and  In all type working department use personal computer.

5:- Laptop :- laptop is also called notebook and  we can all types of working in laptop. it is easy to put one place to another place.and CPU,monitor,keyboard,mouse is commanded in laptop.

6:- Tab late :- Tab late is also a computer and we can do all work on tab late by touch fingers.

 

Computer Hardware & Software

Computer Hardware :- Parts of computer ,which we can see and touch is called computer hardware.

 Ex- CPU, monitor, keyboard,mouse,printer,speaker,mike,scanner,joysticks etc.

Computer Software :- computer software run on hardware. and mainly two type of softer use in computer.

1. System Software :- System software is run on hardware and it's work operate computer.

Ex.- operating system,compiler, utilities program etc.

2. Application Software :- Application software is use for main completing main work on computer.

Ex- M.S. office,Tally,Coral draw,Photoshop,Pagemaker etc.