Interpretation and change: governing law · mistake · implied term · amendment · assignment · novation Performance: force majeure · promise · waiver · warranty · covenant · sovereign immunity · illegality · severability · good faith · commercially reasonable manner · commercial imperative · indemnity · guarantee Breach: breach · repudiation · causation · remoteness of damage · direct loss · consequential loss · foreseeability · damages · contractual negligence · process agent Remedies: damages · adequacy of damages ·equitable remedies · injunction · specific performance · limited recourse · rescission · estoppel · concurrent liability Not contracts: Restitution — quasi-contract — quasi-agency