LMS-ISAM (OSM) Libraries
Elements in this BS1000-compatible library format are identified with a one to eight character name, and a three digit version number. The library is stored and organised as an ISAM file, and will henceforth be referred to as an LMS-ISAM library. Another description, OSM (Old Source Macro), stems from the fact that mostly source programs and macros are stored in this type of library.