"Table of IO Device Characteristics - Console or Teletypewriters". PDP-6 Multiprogramming System Manual(PDF). Maynard, Massachusetts, USA: Digital Equipment Corporation (DEC). 1965. p. 43. DEC-6-0-EX-SYS-UM-IP-PRE00. Archived(PDF) from the original on 2014-07-14. Retrieved 2014-07-10. (1+84+10 pages)
"Table of IO Device Characteristics - Console or Teletypewriters". PDP-6 Multiprogramming System Manual(PDF). Maynard, Massachusetts, USA: Digital Equipment Corporation (DEC). 1965. p. 43. DEC-6-0-EX-SYS-UM-IP-PRE00. Archived(PDF) from the original on 2014-07-14. Retrieved 2014-07-10. (1+84+10 pages)