Scientific Computing Division Service Computation Date Doctor of Science scintillation detector Sickle Cell Disease Source Control Document screening completion date Soil Conservation District Space Control Document Standard Color Display sudden cardiac death System Capability Document Satellite Control Department Schedule Selective Cell Discard sequential compression device Severe Communication Difficulties Signaling Channel Descriptor Small Conversion Data Small Conversion Device Source Control Drawing Source Control Drawings Source-Controlled Drawing Specification Control Document Specification Control Drawing Strategic Communications Division Structured Chip Design subacute combined degeneration Substation Configuration Description sudden coronary death