2019-03-24 [2019-03-24], (原始内容存档于2021-01-04) Ring Team. The Ring programming language and other languages. ring-lang.net. 23 October 2021 [2022-11-03]. (原始内容存档于2022-11-03)
Lucid Lustre LYaPAS Lynx M2001 M4 M# Machine code MAD (Michigan Algorithm Decoder) MAD/I Magik Magma make Maude system Maple MAPPER (now part of BIS) MARK-IV