A glyph is any kind of purposeful mark, which can be an alphabetic or numeric character, a symbol, or a graphic symbol that provides the appearance or form for a character. In typography, a glyph is "the specific shape, design, or representation of a character". A glyph can represent a grapheme, or part of a grapheme, or sometimes several graphemes in combination (a composed glyph). Glyphs are used in computer fonts, on websites, in mobile apps, and in a variety of other contexts, such as in traffic signs, on maps, and in product packaging. Some of the most common types of glyphs include alphabetic glyphs, numeric glyphs, and symbol glyphs. Glyphs can represent characters with a high degree of accuracy, and their shape, size, color, and position can be used to convey meaning. Glyphs can be used to represent words, objects, actions, and more.