If you use the "Set to mixed case (Specific acronyms excluded)" Advanced Field Option, the system will not transform the following text strings to mixed case:
AB
AB)
ABW
ABW)
BC)
BCBS
BEHP
BRHC
BRHC)
c/o
CDPHP
CEO
CHCS
CIO
CJ
CPA
CVS
DBA
FEP
FSC
FSC)
II
III
IV
LLC
LNR
MD
MSBCBS
NCC
NRECA
NW
PHD
PO
RN
SW
UAFC/CHCS
VI
VII
VIII
VP