The Collaborative International Dictionary of English v.0.48:

MSB \MSB\ n.
   See mutual savings bank. [abbr.]
   [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

mutual savings bank \mutual savings bank\ n.
   a state-chartered savings bank owned by its depositors and
   managed by a board of trustees. Abbreviated MSB.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

MSB
    n 1: a state-chartered savings bank owned by its depositors and
         managed by a board of trustees [syn: mutual savings bank,
         MSB]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MSB
       Most Significant Bit (BIT)


The Free On-line Dictionary of Computing (30 December 2018):

Most Significant Bit
MSB

   (MSB) Bit n-1 in an n bit binary number, the bit with the
   greatest weight (2^(n-1)).  The first or leftmost bit when the
   number is written in the usual way.

   (1995-07-13)