| R/C | Red Cross |
| JRC | Junior Red Cross |
| NEXT | Near End Cross Talk |
| XP | Cross Point |
| FCG | False Cross or Ground |
| CMF | Cross flow MicroFiltration |
| CREF | Cross Reference [engl.] |
| CRF | Cross Reference File |
| ECP | Excessive Cross-Posting |
| CSP | Cross System Product |
| DSX | Digital Cross Connect |
| DCS | Differential Cross Section |
| XSS | Cross-Site Scripting |
| ICS | Integral Cross Section |
| DFC | Distinguished Flying Cross |
| RJCP | Refocused J Cross-Polarization |
| BRC | British Red Cross [engl.] Britisches Rotes Kreuz |
| DXC | Digital Cross Connect |
| XPFE | Cross Platform Front End |
| ARC | American Red Cross [engl.] |
| XREF | Cross Reference List |
| SDCS | Single Differential Cross Section |
| MDI-X | Medium Dependent Interface Cross-over |
| DDCS | Double Differential Cross Section |
| AX | Automatic cross connection [engl.] X = cross |
| brcs | British Red Cross Society [engl.] |
| CBL | Cross Border Leasing [engl.] Leasinggeschäfte mit ausländischen Unternehmen |
| CBT | Cross Border Trade [engl.] Grenzüberschreitender Handel |
| CFT | Cross File Transfer [engl.] |
| CIRSC | Cross Interleave Solomon Code |
| CLEF | Cross-Language Evaluation Forum |
| SDXC | Synchronous Digital Cross Connect |
| CIRC | Cross-Interleaved Reed-Solomon Code |
| ccdr | Cross-Correlated Dipolar Relaxation [nmr spectroscopy] |
| XTEM | cross-sectional Transmission Electron Microscopy |
| DACS | Digital Access and Cross-connect System |
| CRISP | Cross-Relaxation Intensity Sequence Pattern |
| BDCS | Broadband Digital Cross-Connect System [engl.] |
| AOX | Automated Optical Cross Connect [phonetischer Begriff] [engl.] |
| 1K | Southern Cross Distribution [IATA-Airline-Code/ Australien] |
| BCBS | Blue Cross/Blue Shield [engl.] Verband unabhängiger Krankenversicherer, USA |