1. Data Structure Manager.
An object-oriented language by J.E. Rumbaugh and M.E. Loomis of GE, similar to C++. It is used in implementation of CAD/CAE software. DSM is written in DSM and C and produces C as output.
["DSM: An Object-Relationship Modeling Language", A. Shah et al, SIGPLAN Notices 24(10):191-202 (OOPSLA '89) (Oct 1989)].