Sector Sites

Tech Sites: CorpTech
Coverage of "45,000 High-Tech Companies" both public and private. Has revenue ranges for private companies.; TechWeb
Information on Tech Companies; Internet Source Book
Searchable index of internet-related companies (broadly defined). Good coverage - address, officers, description, products. Free trial one month subscription.

BEER!!: Breweries Extensive list of breweries around the world with a limited amount of contact information.

Building: Builder Online
Companies, Sales, Officers, Links to Company Sites

Chemicals: The Chemical Industry Home Page
Links to industry associations and chemical companies.

Railways: Railway Links
Links to railway related companies around the world.