Section 1 - Technology Buyer's Guide, Section 2 - Internet Services Guide, and Section 3 - Technical Support Guide, are interesting, but not the most useful feature of the book.
Section 4 - Technology Briefings has some very good descriptions about the various types devices or software packages that a particular topic area contains, and different items to ask vendors about when purchasing a product in that topic area.
Section 5 - The Yellow Pages provides address, phone number, and web address of many many many different manufacturers, resellers, and service providers, broken down by product type.
Section 6 - The White Pages lists manufacturers alphabetically.
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