Daniel L. Murphy is an American computer scientist notable for his involvement in the development of TECO (an early text editor and programming language), the operating systems TENEX and TOPS-20, and email.
There he used an SDS 940 computer running the Berkeley Timesharing System, which provided page memory management in hardware.
When the PDP-10 was announced, he was one of the architects of the TENEX operating system developed for the custom paging hardware designed at BBN.
[5] In October 1972, he joined Digital Equipment Corporation where he first worked as a contractor porting TENEX to the KI10 model of the PDP-10 family.
On January 2, 1973, he joined DEC as an employee, heading the team responsible for the development of the TOPS-20 operating system, an evolution of TENEX for the newer models of the PDP-10 family.