of a filter transfer function Other uses in science and technology ORDER (spacecraft), a space debris removal transport satellite Order (mouldings), each of a series of recessed arches and supports around a doorway or similar feature Classical order, architectonic orders in architecture Collation, the ordering of information Alphabetical order, the ordering of letters Order of reaction, a concept of chemical kinetics Stream order, used to define river networks based on a hierarchy of tributaries See also Chaos (disambiguation) Classification Coordination (disambiguation) Disorder (disambiguation) Ordinal (disambiguation) Organization (disambiguation) Structure (disambiguation)