Chapter 1-12 Web Links:

Links:

Chapter 1: Information Technology Basics
1.5 Math for a Digital Age
1.5.3 Boolean logic gates

http://www.whatis.com
1.5.10 Introduction to algorithms

Dictionary of Algorithms and Data Structures
http://www.nist.gov/dads/

Chapter 2: How Computers Work
2.3 Hardware Components
2.3.2 The motherboard

http://www.amd.com
http://www.viatech.com/jsp/en/products/prodindex.jsp
http://developer.intel.com/design/chipsets/INDEX.HTM
http://www.ali.com.tw/eng/product/product_index.htm
http://www.sis.com/products/index.htm
http://www.opti.com/html/products.html
Chapter 3: Assembling a Computer
There are no links in Chapter 3.
Chapter 4: Operating System Fundamentals
There are no links in Chapter 4.
Chapter 5: Windows 9x Operating Systems
There are no links in Chapter 5.
Chapter 6: Multimedia Capabilities
There are no links in Chapter 6.
Chapter 7: Windows NT/2000/XP Operating Systems
There are no links in Chapter 7.
Chapter 8: Networking Fundamentals
8.8 Connecting to the Internet
8.8.6 Cable modems

http://www.catv.org
http://www.cable-modems.org/tutorial/index.htm
Chapter 9: Printers and Printing
There are no links in Chapter 9.
Chapter 10: Preventive Maintenance
There are no links in Chapter 10.
Chapter 11: Troubleshooting PC Hardware
11.1 Troubleshooting Basics
11.1.9 Diagnostic software

SpinRite – http://grc.com/default.htm 
Checkit – http://www.hallogram.com/ 
PC Technician – http://www.windsortech.com/ 
AMI Diags – http://www.ami.com/
SiSoft Sandra (freeware) – http://www.3bsoftware.com/
Chapter 12: Troubleshooting Software
12.12 Windows 9x/NT/2000 Help
12.12.2 Troubleshooting and information resources

Microsoft TechNet –
http://www.microsoft.com/technet