The Aim of this book is to deal with Microcomputer and Intel 8086 microprocessors, their programming and interfacing etc. It includes assembly language programming of Intel 8086 .This book is very useful to B.C.A., B.Sc. Electronics, M.Sc. Electronics, M.Sc. Computer Science, Electronics Engineering and Diploma in Electronics students. The book is written for the first course on microprocessors, which is in the curriculum of B.C.A., B.Sc. Electronics, M.Sc. Electronics etc.