--- title: Multi-user BASIC slug: multi-user-basic qid: snapshot: enwiki-001311831417 content_hash: license: CC BY-SA 4.0 source: https://en.wikipedia.org/w/index.php?oldid=1311831417 tags: [22936995, 23468805, 24043274, 28699009, 60958065, 90989646] --- # Multi-user BASIC > [!note] Provenance > Snapshot `enwiki-001311831417` · content root `…` > Derived from · Licensed CC BY-SA 4.0 Multi-user BASIC was a dialect of the BASIC language for the DEC PDP-11 running the RT-11 operating system. One or more users were supported in separate address spaces sharing the same language interpreter. The syntax of the language was similar to but not identical to BASIC-11. A key language element was the support for virtual files. These were similar to the virtual arrays in BASIC-PLUS in but more limited. An array of integers, floating-point, or character strings of length 1, 2, 4, 8, 16, 32, or 64 could be placed in file and accessed with a subscript. The file could actually be opened (or re-opened) with a different definition allowing integers, characters, and floating point numbers to be stored in the same file. Like BASIC-11, Multi-User BASIC provided some support for lab equipment, support for character terminals (LA30, VT100). Because it was a multi-user system, it did not support real-time data collection. Multi-user BASIC was a dialect of the BASIC language for the DEC PDP-11 running the RT-11 operating system. One or more users were supported in separate address spaces sharing the same language interpreter. The syntax of the language was similar to but not identical to BASIC-11. A key language element was the support for virtual files. These were similar to the virtual arrays in BASIC-PLUS in but more limited. An array of integers, floating-point, or character strings of length 1, 2, 4, 8, 16, 32, or 64 could be placed in file and accessed with a subscript. The file could actually be opened (or re-opened) with a different definition allowing integers, characters, and floating point numbers to be stored in the same file. Like BASIC-11, Multi-User BASIC provided some support for lab equipment, support for character terminals (LA30, VT100). Because it was a multi-user system, it did not support real-time data collection. ==References==