What is the plural of ....

[Dawood Usmani]

Dear teachers!
What is the plural of M.A., M.Sc. or B.Sc.?
Thanks a million

[Tdol]

We can say em-ays, em-ess-sees, etc. MAs is easy enough, though MScs is trickier. and some style guides recommend using an apostrophe if the last letter is lower case- MSc's.

[Dawood Usmani]

We can say em-ays, em-ess-sees, etc. MAs is easy enough, though MScs is trickier. and some style guides recommend using an apostrophe if the last letter is lower case- MSc's.

Do we omit the full stops (dots) when making them plurals like you did in your examples MScs not M.SC.s?

[Anglika]

It is accepted now that these abbreviations do not need to be punctuated, but are given without. You would not use a full stop, but an apostrophe, as Tdol suggests.