API - application program interface. Related Terms. Application program interface (API) is a set of routines, protocols, and tools for building software applications. An API specifies how software components should interact. Additionally, APIs are used when programming graphical user interface (GUI) components. A good API makes it easier to develop a program by providing all the building blocks.
By Rowena Pedrena. A traditional golf set has 13 clubs: three woods, nine irons (including three wedges) and one putter. The USGA limits the number of clubs a player may carry in his or her bag to 14. A player may include an additional wedge or wood to a fill a gap in hitting distance.
This article is one of our editor's top picks this month. Pursuant to Rule 4-4 of the Rules of Golf, professional golfers may carry only 14 clubs in their bags during a round. Once a round begins, a golfer carrying 14 clubs may not substitute a new club unless one of his clubs is damaged in the normal course of play.