Fast, packed, strict storable arrays with a list interface, a chunky lazy list interface with variable chunk size and an interface for write access via the ST monad. This is much like bytestring and binary but can be used for every Foreign.Storable.Storable type. See also packages http://hackage.haskell.org/cgi-bin/hackage-scripts/package/vector http://hackage.haskell.org/cgi-bin/hackage-scripts/package/uvector with a similar intention.