| IDS | Intrusion Detection System |
| NIDS | Network Intrusion Detection System |
| CSIDS | Cisco Secure Intrusion Detection System |
| ID | Intrusion Detection |
| IDXP | Intrusion Detection Exchange Protocol |
| NADIR | Network Anomaly Detection + Intrusion Reporter |
| IPS | Intrusion Prevention System |
| KIS | Kernel Intrusion System |
| CMDS | Computer Misuse Detection System |
| BIDS | Biological Integrated Detection System [engl.] Labor der US-Armee |
| MID | Multiple Ion Detection |
| ID | Indirect Detection |
| ELCD | Electrochemical Detection |
| LOD | Limit of Detection |
| IFD | Immunofluorescence Detection |
| IrDS | Infrared Detection Set |
| LIDAR | Light Detection and Ranging |
| ERD | Elastic Recoil Detection |
| SAD | Single Atom Detection |
| PDA | Prefailure Detection and Analysing |
| BdL | Below Detection Limit [engl.] |
| RDS | Relative Detection Sensitivity |
| LLD | Lower Limit of Detection |
| NCD | Network Copy Detection |
| EDAC | Error Detection And Correction |
| DPD | Dead Peer Detection |
| EDC | Error Detection and Correction |
| TSD | Time Slice Detection |
| LCUV | Liquid Chromatography with UV detection |
| LIDAR | LIght Detection And Ranging |
| EDC | Error Detection Code |
| ERDA | Elastic Recoil Detection Analysis |
| LSSD | Level-Sensitive Scan Detection |
| AID | Automatic Incident Detection [engl.] Automatische Erkennung von Verkehrsstörungen |
| VAD | Voice Activity Detection / Detector |
| AED | Atom Emission Detection [engl.] |
| ASDE | Airfield Surface Detection Equipment [engl.] Rollfeld-Überwachungsradar auf Flughäfen |
| AIDA | Automatic Incident Detection Application [engl.] Programm zur automatischen Erkennung von Verkehrsstörungen |
| ADRD | Automatic Data Rate Detection [engl.] |
| CSMA/CD | Carrier Sense Multiple Access/Collision Detection |
| TP4 | OSI Transport Protocol Class 4 [Error Detection and Recovery Class] |
| V4FSL | System V Release 4 File System Layout |
| FSS | Fast System Switch [System V] |
| ES-IS | End System to Intermediate System Protocol [OSI] |
| ISIS | Intermediate System to Intermediate System Protocol [OSI] |
| SOC | System On a Chip |
| SIP | System-in-Package |
| SP | System Program |
| KES | Key Escrow System |
| QMS | Qualitätsmanagement-System |