Elm is a popular e-mail program for users of UNIX-based operating systems. Users of a UNIX-based system's non-graphical shell interface can enter the "elm" command to see menus from which they can choose to see their incoming mail or to create outgoing mail. Designed to run with sendmail, /bin/rmail, or any other Unix mail transport agent, elm includes programs like "frm" to show a table of contents of mail, and "printmail" to paginate mail files for printouts.
Originally developed by Dave Taylor, Elm is now developed by a cooperative of volunteers, called the Elm Development Group. Elm is freely distributable software. Its copyright is held by the USENET Community Trust, which assures that it is available to everyone.