Update : November 14, 2022

M is the 13th letter of the English Alphabet.

In the Roman Number System, M has a value of 1000.

M may stand for Million. e.g. 1 Million = 1,000,000

M may stand for Mega. e.g. 1 MB (Megabyte) = 1024 x 1024 bytes (more than a million).
This has roots in using the Binary Number System in computers.

MIT may stand for Massachusetts Institute of Technology in the USA.
Professor Horwood (MIT) came to the University of Rangoon as a Visiting Professor.
Sayagyi U Ba Hli proposed the Twinning Program, and Professor Horwood helped implement on the MIT side by accepting Burmese students for undergraduate and graduate study.

MIT may stand for Mandalay Institute of Technology in Myanmar. BIT (Burma Institute of Technology) was renamed as RIT (Rangoon Institute of Technology) to allow engineering institutes to be opened in Mandalay and other cities.

M&A stands for Mergers and Acquisitions.

M&M stands for a specific brand of chocolate/sweet.

M may stand for Management. e.g. MIS (Management Information Systems).

MI may stand for Machine Intelligence.

MI may also stand for Military Intelligence. — with Kyaw Tint and

5 others.