Folder

Folder most commonly refers to:
 * Folder, one who folds laundry or dry cleaning, e.g., (see Fluff and Fold)
 * File folder, a kind of folder that holds loose sheets of paper

Folder or folding may also refer to:

Art, entertainment, and media

 * Folder, a J-pop group
 * Folder 5, a spinoff group from the J-pop group Folder

Computing

 * Folder (computing), a virtual container within a digital file system, in which groups of files and other folders can be kept and organized, a.k.a. list of files
 * FOLDER (disk compression), a disk compression component of PTS-DOS

Technology and transportation

 * Folding bicycle, a bicycle which can be folded for compactness
 * Folding kayak, a kayak which can be folded for compactness
 * Folding machine, a machine used for folding paper
 * Short Folder, a series of aeroplanes designed with folding wings for shipborne use (from 1913)