MIL-HDBK-1132, DEPARTMENT OF DEFENSE HANDBOOK, SWITCHES, SELECTION AND USE OF (17 DEC 2007)., This handbook consists of the following: a. Selected standard switches, for use in the design and manufacturer of Department of Defense equipment under the jurisdiction of the Department of Defense. b. Guides for the choice and application of switches for use in Department of Defense equipment. Requirements for switches listed in this handbook are covered in the applicable specification (see 2.1). When it has been determined that requirements cannot be met by using switch styles or characteristics listed in the applicable specifications, the design engineer should, with the approval of the cognizant activity, select from the applicable switch specification styles or characteristics not listed herein.