(B) logic; (D) analysis; (E) commutative rings; (F) function theory; (G) geometric topology; (H) operator theory; ((I) probability; (J) algebra; (K) special; (M) lattice theory and universal algebra; (N) noncommutative rings; (O) transformation groups; (P) partial differential equations; (Q) potential theory; (R) algebraic topology; (S) functional analysis; (T) number theory and combinatorics; (U) differentiable manifolds II. Repeatable up to nine credits for (U); unlimited times for the other alphas.