This publication provides members of the House of Representatives information about the range of on-line computer services and data bases available for their use. Section 1 is an introduction. Section 2 describes the nature and general functions of time-sharing services, information systems, and data bases discussed in the document. Section 3 provides a description of communication facilities and office terminals available to Congressmen. Section 4, organization and information resources describes the format used in the appendixes to describe each information resource. The appendixes provide descriptions of information services and resources organized by subject area. (CH)