# Postfix

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**Elastix**— Разработчик …92

**Binary operation**— Not to be confused with Bitwise operation. In mathematics, a binary operation is a calculation involving two operands, in other words, an operation whose arity is two. Examples include the familiar arithmetic operations of addition, subtraction,… …93

**Forth (programming language)**— infobox programming language name = Forth paradigm = Procedural, stack oriented year = 1970s designer = Charles H. Moore typing = typeless dialects = colorForth, Open Firmware implementations = Forth, Inc., GNU Forth, MPE influenced by =… …94

**Operand**— In mathematics, an operand is the object of a mathematical operation, a quantity on which an operation is performed.[1] Contents 1 Example 2 Notation 2.1 Expressions as operands …95

**Polish notation**— Polish notation, also known as prefix notation, is a form of notation for logic, arithmetic, and algebra. Its distinguishing feature is that it places operators to the left of their operands. If the arity of the operators is fixed, the result is… …96

**Function (mathematics)**— f(x) redirects here. For the band, see f(x) (band). Graph of example function, In mathematics, a function associates one quantity, the a …97

**RADIUS**— contextRemote Authentication Dial In User Service (RADIUS) is a networking protocol that provides centralized access, authorization and accounting management for people or computers to connect and use a network service. When a person or device… …98

**Mail delivery agent**— A mail delivery agent or message delivery agent (MDA) is a computer software component that is responsible for the delivery of e mail messages to a local recipient s mailbox.[1] Also called an LDA, or local delivery agent.[2] Within the Internet… …99

**Stack (data structure)**— In computer science, a stack is an abstract data type and data structure based on the principle of Last In First Out (LIFO) . Stacks are used extensively at every level of a modern computer system. For example, a modern PC uses stacks at the… …100

**Posting style**— When a message is replied to in e mail, Internet forums, or Usenet, the original can often be included, or quoted , in a variety of different posting styles.The main options are top posting in which the reply precedes the quoted original message; …