From 1977 to 1988, he was a Systems Programmer at Stanford University. He developed the first production PDP-10 32-bit address ARPANET Network Control Program (NCP) for the WAITS operating system, and wrote or rewrote most of the WAITS ARPAnet protocol suite. Prior to that time most systems only supported the original 8-bit addresses. During that time, he wrote the infamous RFC 748, the only document specifically marked in the RFC index with "note date of issue"; and a series of Telnet implementations for the Incompatible Timesharing System, WAITS, and TOPS-20 operating systems whose escape behavior was playfully immortalized by Guy Steele in the April 1984 Communications of the ACM as "The Telnet Song".