Linked from
The 9 pages that link to Promissory note, each with the reason it gives.
Bills of exchangeCompared with: A note is a promise to pay, while a bill orders someone else to pay.
BanknoteRelated: Early banknotes grew out of transferable promises and deposit receipts.
MortgageRelated: The note records the repayment obligation that the mortgage secures.
Commercial paperNarrower topic: Commercial paper is commonly issued as a negotiable promissory note.
Legal instrumentBroader topic: It records a payment obligation in a form commonly used for lending.