In The Unicode Standard, Meetei Mayek script implementation is discussed in  Chapter 13 South and Central Asia-II: Other Modern Scripts.

The Meetei Mayek script was encoded in The Unicode Standard version 5.2. The script is encoded in the following blocks:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Meetei Mayek ABC0..ABFF 5.2  UABC0.pdf
Meetei Mayek Extensions AAE0..AAFF 6.1  UAAE0.pdf

A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2:

1992-11-25 Unicode Technical Report #3 - Manipuri (Meithei) — Rick McGowan ( Unicode Technical Report #3 R2)

1999-07-20 Unicode Technical Report #3: Early Aramaic, Balti, Kirat (Limbu), Manipuri (Meitei), and Tai Lü scripts — Rick McGowan, Michael Everson ( WG2 N2042,  L2/99-245)

2000-08-09 Meetei Mayek script sample — Asmus Freytag ( L2/00-259)

2001-11-07 Letter from Michael Khumancha to UTC concerning Manipuri script — Rick McGowan ( L2/01-457)

2005-02-07 Issues in Representation of Indic Scripts in Unicode (Unicode Conference Presentation) — Om Vikas ( L2/05-063)

2006-09-20 Preliminary proposal for encoding the Meithei Mayek script in the BMP of the UCS — Michael Everson ( WG2 N3158,  L2/06-308)

2007-08-03 Views of Manipuri University on Meitei Script proposal — L S Singh, S I Singh ( L2/07-256)

2007-08-07 Proposal for encoding the Meitei Mayek script in the BMP of the UCS — Michael Everson ( WG2 N3206,  L2/07-005)

2007-09-10 Comments on Meitei Dandas — Deborah Anderson ( WG2 N3327,  L2/07-311)

2008-03-05 Unicode for Meetei Script — M. Chandramani Singh ( L2/08-136)

2008-04-24 Updated proposal to encode Meetei Mayek in the UCS — Ireland N.B., US N.B. ( WG2 N3470,  L2/08-180)

2008-04-29 Letter from Government of Manipur to Swaran Lata, Gov't of India — M. Chandramani Singh ( L2/08-233)

2008-05-14 7 scanned pages of pre-1980 Meetei Mayek — Swaran Lata ( L2/08-221)

2008-06-18 Letter from Lisa Moore to M. Chandramani Singh, Gov't of Manipur — Lisa Moore ( L2/08-242)

2008-07-18 Proceeding of Meeting of Meetei Mayek Expert Committee Held on 17-07-2008 — L. Mahabir Singh ( L2/08-291)

2008-08-12 Proposed Encoding for Meetei Mayek Block — US N.B., Ireland N.B.( n3473.pdf,  L2/08-232)

2008-08-12 Proposed Encoding for Meetei Mayek Extended Block — US N.B., Ireland N.B.( n3478.pdf,  L2/08-239)

2008-09-11 Letter from Lisa Moore to L Mahabir Singh (Government of Manipur) — Lisa Moore ( L2/08-340)

2013-02-22 Meetei Mayek in Unicode Standard (email) — H. Mathang Singh ( L2/13-078)

2013-04-22 Letter from Rajendra Kumar to Mark Davis re Meetei Mayek encoding — Manoj Jain / GOI ( L2/13-072)

2013-04-26 Proceedings of the meeting of Language/Meetei Mayek Expert Committee held on 17/11/2012 — L. Mahabir Singh ( L2/13-073)

2013-07-24 Unicode Response on Meetei Mayek — Lisa Moore ( L2/13-162)