The Path of the PC Tech -- Operational Procedures -- The Visible Computer -- Microprocessors -- RAM -- BIOS -- Motherboards -- Power Supplies -- Hard Drive Technologies -- Implementing Hard Drives -- Essential Peripherals -- Building a PC -- Windows Under the Hood -- Users, Groups, and Permissions -- Maintaining and Optimizing Operating Systems -- Working with the Command-Line Interface -- Troubleshooting Operating Systems -- Virtualization -- Display Technologies -- Essentials of Networking -- Local Area Networking -- Wireless Networking -- The Internet -- Portable Computing -- Understanding Mobile Devices -- Care and Feeding of Mobile Devices -- Printers and Multifunction Devices -- Securing Computers -- Appendix A: Mapping to the CompTIA A+ Objectives -- Appendix B: About the CD-ROM.