The book contains: Basic Operational Concepts, Bus Structures, Performance ¿ Processor Clock, Basic Performance Equation, Clock Rate, Performance Measurement. Machine Instructions and Programs: Memory Location and Addresses, Memory Operations, Instructions and Instruction Sequencing, Addressing Modes, Assembly Language, Basic Input and Output Operations, Stacks and Queues, Subroutines, Additional Instructions, Encoding of Machine Instructions. Accessing I/O Devices, Interrupts ¿ Interrupt Hardware, Direct Memory Access, Buses, Interface Circuits, Standard I/O Interfaces ¿ PCI Bus, SCSI Bus, USB.