Construction Drawing Abbreviations. The following is a list of abbreviations found on a typical set of construction drawings designed to help you interpret information on your blueprints.
IDMS. IDMS is primarily a network database management system for mainframes. It was first developed at B.F. Goodrich and later marketed by Cullinane Database Systems. Since 1989 the product has been owned by Computer Associates, who renamed it Advantage CA-IDMS and later simply to CA IDMS.
OpenVMS is a proprietary operating system (though the source code is available for purchase). Thus, it is not considered open source software. OpenVMS is a multi-user, multiprocessing virtual memory-based operating system (OS) designed for use in time sharing, batch processing, and transaction processing. When process priorities are suitably adjusted, it may approach real-time operating system characteristics.