Know your Computer
A computer is an electronic device that operates according to the instructions stored in its memory. There are four stages to the information processing cycle: input, process, output and storage. An input device is any hardware device that sends data to the computer. An output device receives information from the computer and translates it from machine language to a form that humans can read.
Computer memory is a physical device that is used to store data or information on a temporary or permanent basis. Computer memory can be broadly categorized into two types: RAM (Random Access Memory) and ROM (Read Only Memory). RAM is both read and write memory. It is a volatile memory. ROM is a read only memory. It is a non-volatile memory. Secondary storage, sometimes called auxiliary storage, is used for bulk storage of programs and data.
A computer is made up of two main parts: hardware and software. Hardware is any physical part of a computer and software is any set of instructions that tells the hardware what to do. There are two types of software: system software and application software. System software are programs that coordinate the activities and functions of hardware and various other programs. Application software are programs that help the users to solve particular computing problems.