On Thu, Mar 29, 2018 at 04:05:10PM -0700, Chuck Guzis via cctalk wrote:
  And yet, productive work was performed on it.  Indeed
the industrial
 variant, the 1710 was used for early process control. 
There were a lot of highway improvements made in the US in the 1950s/
1960s using Bendix G-15s.  That particular branch of civil engineering
was probably that machine's biggest customer.  (OTOH, disclaimer: the
one I used in high school had previously been owned by an oil company.)
mcl