On November 11, 1990, the third revision of the ANSI standard (X11.1-1990) was approved. In 1992 the same standard was also adopted as ISO standard 11756–1992. Use of M as an alternative name for the language was approved around the same time. On December 8, 1995, the fourth revision of the standard (X11.1-1995) was approved by ANSI, and by ISO in 1999 as ISO 11756:1999, which was also published by ANSI. The MDC finalized a further revision to the standard in 1998 but this has not been presented to ANSI for approval. In 1999 the last M Standard (ISO-IEC 11756-1999) was approved. ISO re-affirmed this on 2020. Together with ISO/IEC 15851:1999, Open MUMPS Interconnect and ISO/IEC 15852:1999, MUMPS Windowing Application Programmers Interface.
On novEMber 11 1990 the THird REvision oF thE ANSi STaNdard (X111-1990) wAS aPproved iN 1992 the Same sTandard was also adoPteD AS iso sTaNdard 11756–1992 use OF m aS an alTernativE nAme fOr the LAnGuaGe WaS appRovED aRoUnd thE same tIme on DeceMbEr 8 1995 the fourth REvIsiOn of the stanDard (x111-1995) WAS aPPRoveD by anSi and by IsO In 1999 as isO 117561999 WHiCh wAS aLso puBLIshED by ANsI the mDc finAlIzEd A FuRTher rEvISiOn to tHe sTaNdaRd iN 1998 But This haS not BEeN preSented to anSi For approvAl In 1999 The lAst m STANdarD (iso-IeC 11756-1999) wAs aPProvED iso RE-affirmEd this oN 2020 ToGether WiTh ISO/iec 158511999 open MUMpS inTerconnEct anD iSO/iEc 158521999 mUmps winDowiNG APplication proGrAmMers interfAcE