Research Databases: D

The premier source of information for reference and research, formerly known as ReferenceUSA, this newly designed website with a new name and look offers accurate data on 79 million U.S. businesses and 274 million consumers. Search for businesses by SIC code, sales volume, number of employees, and more. Search for residence directory information by name, location, or phone number.

Free practice tests for automobile instruction permit, a temporary instruction permit identification card (TIPIC) for a motorcycle license, or a commercial learner’s permit (CLP). Official manuals and practice tests to take to prepare for the written knowledge exams.