Unique Reference Number: A unique number assigned to a list member, usually by the email-broadcast software, and used to track member behavior (clicks, subscribes, unsubscribe) or to identify the member to track email delivery.

 

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Unique Reference Number: A unique number assigned to a list member, usually by the email-broadcast software, and used to track member behavior (clicks, subscribes, unsubscribe) or to identify the member to track ema . . . View Full Definition

Personal Identification Number (PIN): A code used by a mobile telephone number in conjunction with an SIM card to complete a call.

Oxidation Number: A convention for representing a charge of an atom embedded within a compound, if the compound were purely ionic. For example, H2O is a covalent compound; if it were ionic, the hydrogens woul . . . View Full Definition

OSI Reference Model: (Open Systems Interconnect) A network communications software standard that consists of a seven layer structure of specified protocol and services.

Preference: Refers to over-the-counter trading. Selection of a dealer to handle a trade despite the dealer's market not being the best available. Often the 'preferenced dealer' will then move his market in line.

Preference Shares: This is a type of share issued by a limited company. It carries a medium risk but has the advantage over ordinary shares in that preference shareholders get the first slice of the dividend ' . . . View Full Definition

Principal Quantum Number: The quantum number that determines the size and (in hydrogen atoms) the energy of an orbital. N is used to label electron shells. N may take on integer values from 1 to infinity.

Preferences: Options a user can set to determine how they want to receive your messages, how they want to be addresses, to which email address message should go and which messages they want to receive fr . . . View Full Definition

Preference Stock: A security that ranks junior to preferred stock but senior to common stock in the right to receive payments from the firm; essentially junior preferred stock.

Ol Number One: A fastball. The term comes from the usual signal that a catcher gives to a pitcher for a fastball, which is pointing the number one down.