Fold, folding or foldable may refer to:

Arts, entertainment, and media

* ''Fold'' (album), the debut release by Australian rock band Epicure *

Fold (poker) In the game of poker, the play largely centers on the act of betting, and as such, a protocol has been developed to speed up play, lessen confusion, and increase security while playing. Different games are played using different types of bets, a ...

, in the game of poker, to discard one's hand and forfeit interest in the current pot *

Above the fold Above the fold is the upper half of the front page of a newspaper or tabloid where an important news story or photograph is often located. Papers are often displayed to customers folded so that only the top half of the front page is visible. Th ...

and below the fold, the positioning of news items on a newspaper's front page according to perceived importance *

Paper folding ) is the Japanese art of paper folding. In modern usage, the word "origami" is often used as an inclusive term for all folding practices, regardless of their culture of origin. The goal is to transform a flat square sheet of paper into a fi ...

, or ''origami'', the art of folding paper

Science, technology, and mathematics

Biology

Protein folding Protein folding is the physical process by which a protein chain is translated to its native three-dimensional structure, typically a "folded" conformation by which the protein becomes biologically functional. Via an expeditious and reproduci ...

, the physical process by which a polypeptide folds into its characteristic and functional three-dimensional structure **

Folding@home Folding@home (FAH or F@h) is a volunteer computing project aimed to help scientists develop new therapeutics for a variety of diseases by the means of simulating protein dynamics. This includes the process of protein folding and the movements ...

, a powerful distributed-computing project for simulating protein folding *

Fold coverage In genetics, shotgun sequencing is a method used for sequencing random DNA strands. It is named by analogy with the rapidly expanding, quasi-random shot grouping of a shotgun. The chain-termination method of DNA sequencing ("Sanger sequencing ...

, quality of a DNA sequence *

Skin fold Skin folds or skinfolds are areas of skin that are naturally folded. Many skin folds are distinct, heritable anatomical features, and may be used for identification of animal species, while others are non-specific and may be produced either by ind ...

, an area of skin that folds

Computing

Fold (higher-order function) In functional programming, fold (also termed reduce, accumulate, aggregate, compress, or inject) refers to a family of higher-order functions that analyze a recursive data structure and through use of a given combining operation, recombine the res ...

, a type of programming operation on data structures *fold (Unix), a computer program used to wrap lines to fit in a specified width *Folding (DSP implementation), a transformation technique using in DSP architecture implementation *Folding (signal processing), an aspect of aliasing *Folding editor, a text editor that supports text folding or code folding, allowing the user to hide and reveal blocks of text *Letter case#Unicode case folding and script identification, case folding is the conversion of letter case in a string *Constant folding, a compiler optimization technique *

, a powerful distributed-computing project for simulating protein folding

Electronics

*Organic user interface, Foldable display *Flexible display

Other uses in science and mathematics

*Fold (geology), one or a stack of originally flat and planar surfaces that are bent or curved as a result of plastic deformation *

, in functional programming, fold refers to a family of higher-order functions that analyze a recursive data structure and through use of a given combining opera *Folding (chemistry), the process by which a molecule assumes its shape or conformation *Folding (Dynkin diagram), in Lie theory, a way of obtaining one Dynkin diagram from another *Fold change, a measure of the difference between two quantities *e-folding, exponential growth or decay *Polygon folding, or polyhedron folding

Other uses

*Amicus Therapeutics, NASDAQ stock trading symbol FOLD *Book folding, in book production *Foldable smartphone, a smartphone with a folding form factor *Folding bicycle, a bicycle designed to fold into a compact form *Folding clothes#Laundry, ironing, storage, Folding clothes, allows apparel to be stored compactly, prevents unwanted creasing, preserves wanted creases, and presents them in a pleasing manner, for instance when displayed on sale in stores *Pen (enclosure), or sheep fold, a sheep pen in British English *Samsung Galaxy Fold, a smartphone *Scottish Fold, a cat breed