Prefix (disambiguation)

A prefix is a part of a word attached to a beginning of a word which modifies the meaning of that stem.
 * Possessive prefix, a prefix used in word formation for creation of various possessive forms

Prefix may also refer to:
 * In computing science:
 * Prefix (computer science), a substring starting at the initial position of a reference string
 * Prefix is one of the attributes defined by the RDFa extension.
 * Network address prefix, the initial part of a network address, used in address delegation and routing
 * Binary prefix, a name or associated symbol that can precede a unit of measure in computing to indicate multiplication by a power of two
 * Prefix order (mathematics), a generalization of the notion of prefix of a string, and of the notion of a tree
 * Numerical prefix, a prefix derived from the words for numbers in various languages, most commonly Greek and Latin
 * SI prefix or metric prefix, a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple
 * Descriptor (chemistry), a prefix placed before the systematic substance name for chemical compounds
 * Prefix code, a type of code in coding theory
 * Namespace identifier of a Unique identifier
 * Trunk prefix, the initial number to be dialled in a domestic telephone call
 * Telephone prefix, the first set of digits in a telephone number not a country code or area code
 * ITU prefix, a call sign for radio and television stations.
 * Ship prefix, a combination of letters used in front of the name of a civilian or naval ship
 * Prefix notation or Polish notation, a method of mathematical expression
 * Prefix Magazine, an alternative media publication about music
 * Prefix (acoustics), the initial part of the sound, one of J. F. Schouten's five major acoustic parameters