X12 4010 Implementation Guidelines
EDItX
EDitX specs at Editeur
RFC959: File Transfer Protocol (FTP)
original FTP RFC
PDF / X - 3 - Graphic technology — Prepress digital data exchange
RFC 1123 - Requirements for Internet Hosts -- Application and Support
1989 RFC that lists some minimum standards hosts of the time must adhear to. Includes some requirements for common protocols like telnet, ftp, smtp and dns