This document provides an introduction to the 8085 microprocessor. It discusses the objectives of the course which are to outline the 8085 microprocessor, develop assembly language programs for applications, and apply interfacing concepts. It defines a microprocessor as an integrated circuit containing all the functions of a computer's central processing unit. It can perform different operations on data depending on the instruction sequence. Early microprocessors like the Intel 8085 and Zilog Z80 were 8-bit processors that processed data in 8-bit pieces. Later processors like the Intel 8086 were 16-bit. The document also discusses the differences between microprocessors which are more bulky with external components and higher speeds, versus microcontrollers which have memory and I/O