Calculus is a branch of mathematics that deals with the study of change and motion. It is used to solve problems in many fields, including physics, engineering, economics, and finance. The crossword solutions for the term CALCULUS CALCULATION ABBR. are VOL (Volume), MIN (Minimum), and LIM (Limit). Volume is a measure of the amount of space occupied by an object or substance. Minimum is the least amount or degree of something. Limit is the greatest amount or degree of something that can be attained or tolerated.