The book includes the practical approach to 8085 and 8051 micro controller. this book involves various programs carried out in a lab for so many years. It can be a collection of good material verified practically.8085 is the microprocessor developed by Intel. Following are the features of 8085 Microprocessor: It is 8 bit size processor developed as single chip using N-MOS.051 micro controller is designed by Intel in 1981. It is an 8-bit micro controller. It is built with 40 pins DIP (dual inline package), 4kb of ROM storage and 128 bytes of RAM storage, 2 16-bit timers. It consists of are four parallel 8-bit ports, which are programmable as well as addressable as per the requirement.