Billy Pettit real disappointment

Brent Hilpert hilpert at cs.ubc.ca
Thu Jun 28 17:13:48 CDT 2007


Roger Holmes wrote:

> MOST?????    STANDARD?????    Rubbish!     IBM 7094 - 36 bits. ICT
> 1301 - 48 bits. CDC 6600/7600 60 (or was it 64?) bits. CDC SC17 (not
> sure exact era) - 16 bits. Elliott 903/920B/905/920C/920ATC - 18
> bits. Many of the BCD machines used 4 bit words I believe. Mid 60s
> ICL 1900 - 24 bits. What used 40 bits?

Some 40 bit machines from the early 50's:

  - von Neumann's IAS machine and it's duplicates/descendants:
    ILLIAC, ORDVAC, MANIAC, not sure about the JOHNIAC,

  - Manchester/Ferranti Mark I series

Some other oddball values from that era:
  - BINAC: 31 bits
  - EDSAC: 35 bits
  - SWAC:  37 bits
  - EDVAC: 44 bits
  - SEAC:  45 bits



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