Transactions within Article 9 -- Creation and enforceability of security interests -- Ongoing financing relationships -- Perfection in general -- Perfection by filing -- Perfection by possession and control -- Automatic perfection -- Temporary perfection and perfection of proceeds -- Multistate transactions -- Among secured parties -- Purchasers (other than secured parties) versus perfected secured parties -- The farm products rule -- Creditors with liens arising by operation of law -- Purchasers (other than secured parties) and lien creditors versus unperfected secured parties -- Fixtures, accessions and commingled goods -- Bankruptcy -- Default and its consequences -- The foreclosure process -- The consequences of creditor misbehavior