Archived at Ghostarchive and the Wayback Machine: Burroughs Corporation (1969), Burroughs B6500 Status Report (film), Nigel Williams (published 2015-08-08), Timecode: 1969 status - 0:00-0:52, 6:04-7:01, 8:14; date - 3:40, 4:21, retrieved 2019-03-04
Anderson, James P.; Hoffman, Samuel A.; Shifman, Joseph; Williams, Robert J. (1962), "D825 - a multiple-computer system for command & control", Proceedings of the December 4–6, 1962, Fall Joint Computer Conference, AFIPS Conference Proceedings, vol. 24, pp. 86–96, doi:10.1145/1461518.1461527, ISBN9781450378796, S2CID1186864
Archived at Ghostarchive and the Wayback Machine: Burroughs Corporation (1969), Burroughs B6500 Status Report (film), Nigel Williams (published 2015-08-08), Timecode: 1969 status - 0:00-0:52, 6:04-7:01, 8:14; date - 3:40, 4:21, retrieved 2019-03-04
Anderson, James P.; Hoffman, Samuel A.; Shifman, Joseph; Williams, Robert J. (1962), "D825 - a multiple-computer system for command & control", Proceedings of the December 4–6, 1962, Fall Joint Computer Conference, AFIPS Conference Proceedings, vol. 24, pp. 86–96, doi:10.1145/1461518.1461527, ISBN9781450378796, S2CID1186864
Archived at Ghostarchive and the Wayback Machine: Burroughs Corporation (1969), Burroughs B6500 Status Report (film), Nigel Williams (published 2015-08-08), Timecode: 1969 status - 0:00-0:52, 6:04-7:01, 8:14; date - 3:40, 4:21, retrieved 2019-03-04
"Libra 750". Unisys. 24 June 2021. Archived from the original on 11 March 2020. Retrieved 16 May 2018.
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Archived at Ghostarchive and the Wayback Machine: Burroughs Corporation (1969), Burroughs B6500 Status Report (film), Nigel Williams (published 2015-08-08), Timecode: 1969 status - 0:00-0:52, 6:04-7:01, 8:14; date - 3:40, 4:21, retrieved 2019-03-04