| Abbreviation | Definition |
|---|---|
| CSA | Client Server Architecture |
| CSA | Client Solution Architects |
| CSA | Cross-Sectional Area |
| CSAD | Cleveland School of Architecture and Design |
| CSAO | Chee Salette Architecture Office |
| CSARB | Corporate Security Architecture Review Board |
| CSAW | Centre for Sustainable Architecture with Wood |
| CSDCA | Centro Studi e Documentazione della Cultura Armena |
| CSI | Construction Specifications Institute |
| CSK | CounterSinK |
| CSLA | Component-based Scalable Logical Architecture |
| CSNA | Cisco Systems Network Architecture |
| CSOA | Combat Service Oriented Architecture |
| CSPA | Common Statistical Production Architecture |
| CTA | Certified Technical Architect |
| CTA | Certified TestStand Architect |
| CTAA | Colegio Territorial de Arquitectos de Alicante (Spanish: Territorial College of Architects of Alicante) |
| CTBA | Construction Technology Business and Architecture |
| CTBUH | Council on Tall Buildings and Urban Habitat |
| CTC | Center To Center |