Orr’s Connecticut Radiation Dosage Calculator and the US Army ABC-M1A1

This Cold War calculator  was designed  by William Orr of the University of Connecticut in 1950-1.  The calculator was commissioned by the Connecticut State Office of Civil Defence and made by Consolidated Nucleonic.  They were sold to the  public for $1.

Orr’s calculations and assumptions were used in the design of many other Cold War calculators.

A military version of Orr’s Radiation Dosage Calculator, the ABC-M1A1, was used by the US Army after modifying the instruction to suit  military users. The calculator was used to determine  radiation dosages after a nuclear explosion.

For more posts about Cold War calculators click on the Cold War Calculators category on the right.

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