MSDMicro Systems Development / Microsoft Diagnotic / Microwave Semiconductor Device / Most Significant Digit
ICDInteractive Call Distribution / International Code Designation/Designator
MCNMetropolitan Campus Network
ESOCEuropean Space Operations Center
NICENetwork Information and Control Exchange
OSPSOperator Service Position System
NPRMNotice of Proposed Rule Making
CACHEKTSCall Appearance Call Handling Electronic Key Telephone Service
SDLGRSpecification and Description Language Graphical Representation
RTFIRead the Friendly Instructions
DFSKDifferential Frequency Shift Keying
PCTRProtocol Conformance Test Report
IRDAInfrared Data Association / Infrared Developers Association
SCNRSorry CouldN't Resist
DECDNSDigital Equipment Corporation Distributed Name Service (usually as DECdns)
MRMMaximum Rights Mask / Most Recently used Master
ADASAdvanced Directory Assistance System
APTSAdvanced Public Transportation
MSDMicro Systems Development / Microsoft Diagnotic / Microwave Semiconductor Device / Most Significant Digit