A Bachelor of Science (or BS) was a title given to individuals who had completed university courses related to sciences.
Henry Starling received a Bachelor of Science sometime in the late 20th century. (VOY: "Future's End")
In the mid-24th century, Leah Brahms earned a Bachelor of Science, cum laude, in Subspace Physics from the University of Alpha Centauri. (TNG: "Booby Trap")