The document discusses the 8085 microprocessor instruction set. It introduces the 8085 instruction formats which can be single byte, double byte, or triple byte depending on the operation and operands. The single byte format only contains an opcode, while the double and triple byte formats contain opcodes and data or address operands. The document also notes some key features of the 8085 instruction set, including using the program counter to hold the next instruction address, using the accumulator as an operand and destination, and utilizing general purpose registers.