| COFDM | Coded Orthogonal Frequency Division Multiplex |
| OFDM | Orthogonal Frequency Division Multiplex/Multiplexing |
| VOFDM | Vector Orthogonal Frequency Division Multiplexing |
| FDMA | Frequency Division Multiple/Multiplex Access |
| CDM | Code Division Multiplex |
| CDM | Code Division Multiplex [engl.] Datenübertragungsverfahren |
| WWDM | Wide Wavelength Division Multiplex |
| CWDM | Coarse Wave Division Multiplex |
| BCFSK | Binary Coded Frequency Shift Keying [engl.] Digitales Modulationsverfahren |
| FDM | Frequency Division Multiplexer/Multiplexing |
| OFM | Optical Frequency Division Multiplexer/Multiplexing |
| OFD | Optical Frequency Division Demultiplexer/Demultiplexing |
| GOE | Gaussian Orthogonal Ensemble |
| DOPE | Discrete Orthogonal Polynomial Expansion |
| APSG | Antisymmetrized Product of Strongly orthogonal Geminals [engl.] |
| MPX | Multiplex |
| JMX | Jumbogroup Multiplex |
| MMX | Mastergroup Multiplex |
| TMS | Tonfrequenz-Multiplex-System |
| RUM | Remote User Multiplex |
| PMXAS | Primaer-Multiplex-Anschluss [ISDN] |
| BMC | Block Multiplex Channel [engl.] |
| BMC | Block Multiplex Channel [engl.] |
| CI | Coded Information |
| CSS | Coded Switch Set |
| GCR | Group Coded Recording |
| MCU | Minimum Coded Unit |
| DCV | Destination Coded Vehicle |
| COC | Coded Optical Character |
| CID | Coded Information-Dokument |
| CMI | Coded Mark Inversion |
| MUSICAM | Masking Universal Subband Integrated Coding and Multiplex |
| BCPL | Binary Coded Programming Language |
| BCO | Binary Coded Octals [engl.] 8-er Zahlensystem |
| BCN | Binary Coded Normal [engl.] |
| BCI | Binary Coded Information [engl.] |
| BCD | Binary Coded Digit // Decimals [engl.] Zweiwertige Zahlendarstellung |
| BCDD | Binary Coded Decimal Digit [engl.] |
| ORACLE | Optional Reception of Announcement by Coded Line Electronics |
| BCDIC | Binary Coded Digit Interchange Code [engl.] |
| CTCSS | Continuous Tone Coded/Controlled Squelch System |
| EBCDIC | Extended Binary Coded Decimal Interchange Code [IBM] |
| DIV | Division |
| D.B. | division blindée [frz.] Panzerdivision |
| Div | Division [10.000 - 20.000 Soldaten - im Heer] Bundeswehr-Kürzel-Truppenstärke |
| GPD | Graphics Products Division |
| DSO | Division für Spezielle Operationen Berlin, http://www.bundeswehr.de |
| ECD | East Coast Division [Sun] |
| EPD | Entry Products Division |
| DLO | Division Luftbewegliche Operationen |