MIL-HDBK-1350-2 (VOL. 2), MILITARY HANDBOOK: DATA COMMUNICATIONS PROTOCOL CONFORMANCE AND INTEROPERABILITY TESTING AND REGISTRATION (28 JUN 1994) [NO S/S DOCUMENT]., The purpose of this volume of MIL-HDBK-1350 is to provide the guidance for requirements, responsibilities, procedures, and structure of the conformance and interoperability testing of data communications protocols within the Department of Defense.