This is a user friendly book on Computer Architecture and Maintenance. It treats the subject content from a practical perspective. No knowledge of computer hardware is assumed while writing this book. Anyone who has used a personal computer system for a moderate amount of time and is fascinated by this magic machine can read and understand this book. It strikes a perfect balance between the theoretical aspects of computer architecture with the practical realities. It can be used as a text book as well as a reference book. Every chapter includes exercises based upon the chapter contents. Starting from the motherboard components the book spans the input/output devices, storage devices, display devices, various interfaces and power supply unit. It also discusses the trouble shooting of a personal computer in detail. The Topics Covered in the Book: Motherboard Processor Chipset Memory Buses Hard Disk Storage Flash Device Storage CD/DVD Storage Display Devices Color Display Units LCD Display Units Display Controllers Input/Output Devices Keyboard Mouse Printer Scanner Modem Computer Interfaces SCSI Interface IDE Interface USB Interface RS232 Interface (Serial Port) Centronic Interface (Parallelport) Firewire Interface Power Supply Linear Power Supply SMPS System UPS System PC Diagnostics POST Routine Diagnostic Software Preventive Maintenance Troubleshooting Integrated Circuit Testing