http://www.rfc-editor.org/rfc/rfc1068.txt
RFC 1068: Background File Transfer Program (BFTP), A.L. DeSchon, R.T. Braden1988-08-01T23:00:00-00:00This RFC describes an Internet background file transfer service that is built upon the third-party transfer model of FTP. No new protocols are involved. The purpose of this memo is to stimulate discussions on new Internet service modes.