Know your evaluation disciplines: - LTR: Operands are evaluated from left to right - RTL: Operands are evaluated from right to left - Unspecified: Operands are evaluated in an unspecified order - Hydraulic: Operands carry implicit quantities of "area" and "force," and are evaluated in order from highest to lowest pressure. (Mnemonic: high-pressure operands are the first to "puncture" a fictitious "evaluation membrane")