as input, processes it according to instructions stored in its memory, and provides results as output Bit A digit of the binary number or code Nibble The 4-bit binary number or code Byte The 8-bit binary number or code Word The 16-bit binary number or code Double Word The 32-bit binary number or code Data The quantity operated by an instruction of a program is called data. The size of the data is specified as Bit, Byte,Word…….. Address The address is an identification number in binary for Memory locations. The 8086 processor uses 20-bit address for memory. Bus A bus is a group of conducting lines that carries data,address and control signals. Introduced in 1978 . Comes in Dual-In-Line Package(DIP) IC. 8086 1s a 16-bit microprocessor . Works on 5 volts power supply. It is built on single semiconductor chip and packaged in an 40-pin IC. It has 20-bit address bus and 16-bit data bus. It can directly address upto 220 I.e., 1M bytes of memory. The maximum internal clock for 8086 is 5MHz