COMPRESSION MOLDING COMPOSITE Composites are combinations of materials differing in composition or form on a macro scale. The constituents retain their identities in the composite. Normally, the components can be physically identified, and there is an interface between them. COMPOSITE ARMOR Composite armor is an armor configura- tion consisting of two or more different armor materials bonded together to form a protective unit. COMPOSITE CLASS A major subdivision of composite con- struction in which the class is defined by the fiber system and the matrix class, e.g., organic-matrix filamentary laminate. COMPOSITED CIRCUIT A circuit that can be used simulta- neously for telephony and DC telegraphy, or signaling; separation between the two being accomplished by frequency discrimination. COMPOSITE MATERIAL Composites are considered to be combinations of materials differing in composition or form on a macro scale. The constituents retain their identities in the compos- ite; that is, they do not dissolve or otherwise merge completely into each other, although they act in concert. Normally, the components can be physically identified and exhibit an interface between one another. COMPOSITION This term is used in classifying commodities that are differentiated strictly by their respective chemical composition. It is designated in accordance with accepted trade practice. COMPOUND MOUNT A three-element holding or support device consisting of an intermediate mass contained between resil- ient elements used for protection of a supported device from vibra- tions or acceleration. Also called a two-stage mount. COMPREHENSIVE TESTABILITY An overall testability design characteristic that includes both hardware design and test design. COMPRESSION An operation performed on raster image data to remove redundant information and thus reduce the stored or inter- changed size. Negative compression is the case when this operation results in an increase rather than a decrease in size. COMPRESSION MOLDING A technique of thermoset molding in which the molding compound (generally preheated) is placed in the open mold cavity, the mold is closed, and heat and pressure (in the form of a downward moving ram) are applied until the material is cured. 65