The crossword solution for the term SUBJ. THAT MAY BE BOOLEAN OR LINEAR is ALG, which stands for Algebra. Algebra is a branch of mathematics that deals with symbols and the rules for manipulating those symbols. It can be used to solve equations, model real-world situations, and study the properties of functions. Algebra can be divided into two main categories: Boolean algebra, which is used to analyze logical statements, and linear algebra, which is used to study linear equations and vectors.