M runs in an encapsulated environment that supports multiple users and multitasking. In 1980 Marc Gray teamed up with him, formed Patterson, Gray and Associates, and they came out with an ANSI Standard implementation named PSM-11. In August of 1998 the bug hit again. Database Self Expanding Windows File. 4096 byte block size.
File permissions allow for shared read.
The file is used in a non-buffered mode so data is written directly to the disk. Globals Multi-way Balanced Tree structure. Each global is stored separately and may contain optional pointer blocks if it is larger than 4K in size. Routines Routines are stored in 4k disk blocks and are loaded into memory upon demand. All users share the same memory copy.