Abbreviations of Bachelor of Arts and Bachelor of Science. Always use periods.
bachelor’s degree
Do not capitalize academic degrees used as general terms of classification. Always use 's.
biannual
Refers to twice each year. Semiannual may also be used.
biennial
Refers to once every two years. Example: biennial budget.
BLD (Blended)
board
Capitalize when the complete proper name of the board is used (Moraine Park District Board, State Board of WTCS), but lowercase when alone (the board met to discuss...).