| http://www.w3.org/ns/prov#value | - > The B5500 was ca 1964, the 6500 ca 1970, the 8500 (as I recall) was from the military part of Burroughs in Paoli, Pa and was an attempt to hybridize their military B825 with some of the California ideas" of the B5500 along with some thin-film in various parts of the memory for speed.
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