Nepal is a underdevelopment country so information teclnology play vital roal in every field.we can use computer in various field like school, bank. hospital, airport, construction company etc. Now a days every school has computer classes, as well as different companies gives computer training according to our requirement. Now IT rate is below 5% because it is limited only city area.

Now a days we can see computer in almost field in Nepal, but it cannot reach in all Nepal, due to computer system different Banks are growth rapidly. They are use E-banking, SMS banking, ATM system etc. In education field we can use for E-learning, distance education etc. In communication field we can find almost IT application like in mobile, billing system. In hospital we can apply computer for X-ray, city can, different equipment measurement, in pathology lab etc. Today's web designing is applicable in every field. almost company make their web site for promote their business, every college has own website as well as many person has their own site like .com,. com.np due to web page development many people facilitated. networking is on of the most essential thing for us. Due to Internet we can find various things, we can in closed with our friends,we can read foreign countries news, playing games.many company pro vied Internet provide for us like NTC, Wordlink, etc.

Computer is an electronic device in which we can store huge amount of data, process the data and manipulate the data.It has different parts like CPU, monitor, mouse, memory unit, printer etc, generally we use Microsoft operating system for application,Computer has input unit,output unit and memory unit.input unit means we can send raw data through it like mouse, keyboard, scanner etc. output unit means printer, monitor. CPU is the brain of computer it contains memory unit, Alu and control unit.There are two types of memory RAM and ROM.