Computer Security and virus:- Security:- "Data or information security is the the protection of data against accidental or intentional, destruction, disclosure or modification". Computer data security refers to the technological safeguards and managerial procedure which can be applied to computer hardware, software and data to ensure that organizational and individual privacy are protected. Comp...

World Wide Web (WWW): The World Wide Web came into being in 1991, and the concept given by Tim Berners-Lee. The World Wide Web is a system of interlinked hypertext documents accessed via the Internet. Hypertext is one method of presenting information in which certain items are highlighted. By selecting the highlighted text, you can obtain more information on the same topic. Tim Berners-Lee introd...

Data Communication are the exchange of data between two devices via some form of transmission medium such as wire cable. Communication can be defined as the exchange of information between one group or person and another group or person. This communication can be between people within the same organisation (internal communication) or with people or groups outside the organization (external communi...

SOFTWARE:- Combination of more than one program is known as software which can be developed to accomplish specific task and set of instruction known as program. A computer programmer writes the software that gives a computer the ability to solve any business or scientific problem. Software is classified into three category discussed below:- 1. Application software 2. Utility software 3. System...

Computer System is classified into two parts Computer System Hardware Software Computer Hardware:- All the physical component that grouped together and form a complete system known as hardware. e.g:- PC-Case,motherboard, RAM,ROM,Hard Disk, Monitor, keyboard, mouse ..etc System Unit:- A system unit includes a board called a motherboard that holds a microprocessor chip (or a CPU),memory chips,...