| CI | Configuration Interaction |
| FCI | Full Configuration Interaction |
| HCI | Hylleraas Configuration Interaction |
| RCI | Restricted Configuration Interaction |
| DC-CI | Dissociation-Consistent Configuration Interaction |
| cpci | Coupled-Perturbed Configuration Interaction |
| LFCI | Ligand Field Configuration Interaction |
| MRCI | Multi Reference Configuration Interaction |
| ccci | Correlation-Consistent Configuration Interaction |
| SDCI | Singly and Doubly excited Configuration Interaction |
| BNI | Before Next Interaction [engl.] |
| FI | Feature Interaction |
| IEC | Electrostatic Interaction Chromatography |
| ILO | Interaction Localized Orbital |
| NQI | Nuclear Quadrupole Interaction |
| PCI | Post-Collision Interaction |
| EIC | Electrostatic Interaction Chromatography [alt.:IEC] |
| ISF | Interaction Site Formalism |
| HCI | Human Computer Interaction/Interface |
| RISM | Reference Interaction Site Model |
| CHI | Computer Human Interaction/Interface |
| BIC | Biospecific Interaction [affinity] Chromatography [engl.] |
| DIPR | Direct Interaction with Product Repulsion [Modell] |
| MVIP | Multi Vendor Integration/Interaction Protocol |
| CFG | Configuration [engl.] |
| WZC | Wireless Zero Configuration |
| CM | Configuration Management |
| ICU | ISA Configuration Utility |
| CW | Configuration Wavefunction |
| CFM | Configuration Management |
| LCF | LAN Configuration Facility |
| SCM | Software Configuration Management |
| OVC | Optimized Valence Configuration |
| SBR1 | Statistical Bit Rate Configuration 1 |
| FCT | Firewall Configuration Tool |
| HCP | Host Configuration Protocol |
| CFM | Configuration Management [engl.] |
| CCE | Configuration Control Element |
| CID | Configuration, Installation, Distribution |
| CMP | Configuration Management Plan |
| CCE | Configuration Control Element |
| CSF | Configuration State Function |
| DCT | Database Configuration Tool |
| BSSC | BPX Switch and Service Configuration |
| CEM | Configuration Element Management |
| ECU | EISA Configuration Utility |
| EDT | Editor Configuration von Disnavigator eine Dateiendung |
| CID | Configuration, Installation, Distribution |
| CCM | Change Configuration Management [engl.] |
| SCLM | Software Configuration Library Manager [IBM] |