Hardware

Computer hardware refers to the physical components of a computer that can be seen & touched by the user. Hardware is one of the basic and necessary parts of a computer system. Computer hardware also includes communication bus, ports, input device, an output device, etcSome commonly used input devices areKeyboard, Mouse, Joystick, smart card reader, microphone, biometric sensor. The mouse was invented by Douglas Engelbart at Stanford research center in 1963.  

Random-access memory (RAM /ræm/) is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code.A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory. In contrast, with other direct-access data storage media such as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory, the time required to read and write data items varies significantly depending on their physical locations on the