emester Students. Share with your friends and help them to learn Fundamental of Computers. There are Five subjects in BCA first semester .MAKHANLAL CHATURVEDI NATIONAL UNIVERSITY OF JOURNALISM AND COMMUNICATION. "A computer keyboard is one of the primary input devices used with a computer. Similar to an electric typewriter, a keyboard is composed of buttons that create letters, numbers, and symbols, as well as perform other functions. The following sections provide more in-depth information and answers to some of the more frequently asked questions about the keyboard. The following image shows a 104-key Saitek keyboard with arrows pointing to each section including the control keys, function keys, LED indicators, wrist pad, arrow keys, and keypad. Today, most desktop computer keyboards connect to the computer using either USB or Bluetooth for wireless communication. Before USB, a computer may have used PS/2, serial port, or AT (Din5) as a keyboard interface."