- AcqWeb's Directory of Publishers and Vendors -- an international directory of publishers and vendors used by libraries.
- Chiefs of State -- a directory of Cabinet Members and Chiefs of State of foreign countries.
- Congressional Directory -- prepared by the Joint Committee on Printing (JCP), this is the official directory of the U.S. Congress, which presents short bibliographies of each Member of the Senate and the House, and includes additional data such as his/her committee memberships, terms of service, administrative assistant and/or secretary, room and telephone numbers.
- Buro's Institute of Mental Measurements -- Includes links to the Educational Testing Service (ETS) / ERIC Test Collection database contains descriptions of over 10,000 tests and research instruments as well as to a searchable database of citations to reviews of educational and psychological tests and measures that The Buros Institute of Mental Measurements and ProEd have included in their directories.
- Embassy World -- a directory of the world's embassies and consulates.
- TileNet -- a directory of mailing lists, Usenet newsgroups, FTP sites, computer products vendors, and internet & web design companies.
Phone/ Email / Mail Directories
- All Nations Telephone Search Engine -- "Dialing Codes & Directories Worldwide. Easy to navigate - Easy to use. Allows you to search over 700 on-line telephone directories."
- AnyWho Directory -- search for people or businesses (including toll-free numbers); has reverse lookup capabilities and an internet search option.
- The Internet 800 Directory - Locate toll free telephone numbers for products and services.
- Switchboard-- a free nationwide residential and business directory.
- Telephone Directories on the Web -- "The Internet's original and most complete index of online phone books, with over 350 links to Yellow Pages, White Pages, Business Directories, Email Addresses and Fax Listings from over 150 countries all around the world."
- United States Postal Service Zip+4 lookup -- a zip code directory
- YELLOWPAGES -- internet Yellow Pages and search directory for comprehensive national and local business information.
