JCA
JCA is an abbreviation for:
- Japan Chess Association , the umbrella organization for chess players in Japan
- Japanese Choral Association , umbrella organization for choirs in Japan
- Java Cryptography Architecture , a standardized Java programming interface (API) for cryptography
- Java EE Connector Architecture , a software architecture and programming interface (API) for integrating heterogeneous applications into the Java EE platform.
- Jewish Colonization Association , an association founded in 1891 for the establishment of Jewish colonies in America