Slide 4 of 27 - The REXX: assign points to the S: directory in older versions of AmigaOS. For neatness I like to change this to point at a separate SYS:Rexx directory, as it is in newer releases. - The RX command is used to run an ARexx script from the Shell, e.g. RX test.rexx - ARexx hosts are tasks that present an ARexx port to which messages may be sent