Code for Automation of Libraries and Documentation Center's: ABCD version 2.x
Acronym ABCD stands for:
Automatización de Bibliotecas y Centros de Documentación
Automation des Bibliothèques et Centres de Documentacion
Automatização das Bibliotecas e dos Centros de Documentação
Automatisering van Bibliotheken en Centra voor Documentatie
ABCD was initially developed by Bireme with the support of VLIR/UOS and based on UNESCO-supported ISIS-technology. Currently the development is solely done by volunteers in several countries but not enough thanks can be given to G. Ascencio and E. Spinak.
Please check also the ABCD wiki.