| SAG | Street A Guide |
| CSD | Christopher Street Day |
| WSJ | Wall Street Journal New York, http://www.wsj.com |
| MSN | Manhattan Street Network |
| HSR | Hamilton Street Railway [engl.] Frühere amerikanische Strassenbahngesellschaft |
| SSBTC | State Street Bank and Trust Company |
| ICT | In-Circuit Test |
| VC | Virtual Circuit |
| ODC | Overdrive Circuit |
| GCI | General Circuit Interface |
| PCA | Printed-Circuit Assembly |
| ICAN | Individual Circuit ANalysis |
| DLC | Digital Leased Circuit |
| CTM | Circuit Transfer Mode |
| IC | Input/Integrated Circuit |
| ICC | Integrated Circuit Card |
| ICE | In-Circuit Emulator/Emulation |
| IIC | Inter Integrated Circuit [Bus] |
| PCB | Printed Circuit Board |
| PIC | Programmable Integrated Circuit |
| SCC | Short Circuit Current |
| VCS | Virtual Circuit System |
| CSN | Circuit Switched Network |
| SCN | Switched Circuit Network |
| CSD | Circuit Switched Data Datenübertragungsstandard in GSM-Netzen |
| CPC | Circuit Provisioning Center |
| CCH | Connections per Circuit per Hour |
| COC | Circuit Order Control |
| MMIC | Monolithic Microwave Integrated Circuit |
| ITAC | ISDN Terminal Adapter Circuit |
| CCA | Circuit Court of Appeals [engl.] |
| CCTV | Closed Circuit Television [engl.] Leitungsgebundene Video-Übertragung |
| CES | Circuit Emulation Service [engl.] Transport von Sprachdaten über ATM |
| CBE | Circuit Breaker for Equipment [engl.] Geräteschutzschalter |
| SCAN | Switched Circuit Automatic Network |
| CAS | Circuit and Systems Society [engl.] Piscataway, [NJ], http://www.ewh.ieee.org/soc/icss |
| PLIC | Programmable Logic Integrated Circuit |
| ACE | Automatic Circuit Exchange [engl.] Telekommunikation |
| TLC | Trunk Logic Circuit [Nortel] |
| ALC | Arithmetic and Logic Circuit [engl.] |
| VHSIC | Very High Speed Integrated Circuit |
| VLSIC | Very Large Scale Integration Circuit |
| FPIC | Field Programmable Interconnect Circuit |
| CLRC | Circuit Layout Record Card |
| CSIC | Customer Specific Integrated Circuit |
| CSDC | Circuit Switched Digital Capability |
| EDAC | Electromechanical Digital Adapter Circuit |
| DCE | Data Circuit/Communication Equipment |
| DCME | Digital Circuit Multiplication Equipment |
| CQMS | Circuit Quality Monitoring System |