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.
Most golfers also carry 3 and 5 woods in their bag. A 3 wood has a loft between 15 and 18 degrees, and a 5 wood has a loft between 20 and 22 degrees. The higher the golf club number, the higher the loft. Also, the higher the golf club number, the shorter the club shaft length.