The aim of this book is to understand: Overview of the 8051 Family: Inside the 8051, Introduction to 8051 Assembly Programming, Assembling and Running an 8051 Program, the Program Counter and ROM Space in the 8051, Data types and Directives, 8051 Flag Bits and the PSW Register, 8051 Register Banks and Stack. Unsigned Addition and Subtraction, Unsigned Multiplication and Division, Signed Number, Concepts and Arithmetic Operations. Logic and Compare Instructions, Rotate and Swap Instructions, BCD and ASCII Application Programs.