A promissory note
is a legal instrument (more particularly, a financial instrument), in which one party (the maker or issuer) promises in writing to pay a determinate sum of money to the other (the payee), either at a fixed or determinable future time or on demand of the payee, under specific terms. If the promissory note is unconditional and readily salable, it is called a negotiable instrument.
Referred to as a note payable in accounting (as distinguished from accounts payable), or commonly as just a "note", it is internationally defined by the Convention providing a uniform law for bills of exchange and promissory notes, although regional variations exist. A banknote is frequently referred to as a promissory note: a promissory note made by a bank and payable to bearer on demand. Mortgage notes are another prominent example.
Promissory notes are a common financial instrument in many jurisdictions, employed principally for short time financing of companies. Often, the seller or provider of a service is not paid upfront by the buyer (usually, another company), but within a period of time, the length of which has been agreed upon by both the seller and the buyer. The reasons for this may vary; historically, many companies used to balance their books and execute payments and debts at the end of each week or tax month; any product bought before that time would be paid only then. Depending on the jurisdiction, this deferred payment period can be regulated by law; in countries like France, Italy or Spain, it usually ranges between 30 to 90 days after the purchase.
Notes in perfumery are descriptors of scents that can be sensed upon the application of a perfume. Notes are separated into three classes; top/head notes, middle/heart notes, and base notes; which denote groups of scents which can be sensed with respect to the time after the application of a perfume. These notes are created carefully with knowledge of the evaporation process and intended use of the perfume. The presence of one note may alter the perception of another - for instance, the presence of certain base or heart notes will alter the scent perceived when the top notes are strongest, and likewise the scent of base notes in the dry-down will often be altered depending on the smells of the heart notes.
The idea of notes is used primarily for the marketing of fine fragrances. The term is sometimes used by perfumers to describe approximately scents or the perfumery process to laypeople.
Fragrant materials are listed by Poucher in order of volatility and are grouped under respective evaporation coefficients (perfume notes) that range from 1 to 100.