Monroe EPIC 3000 Calculator
Monroe had established an electronic computer business in the 1950s (see the Monrobot entry in the Computers section) and this should have alerted them to the potential for electronics to displace mechanical calculators. The computer division should also have been able to supply established electronic design and construction engineers. All the elements seem to be in place for Monroe to transition from leadership in mechanical calculators to leadership in electronic calculators, with the EPIC machines as the first step.
The EPIC machines however are a weird hybrid of forward-looking electronic logic with backward-looking mechanical interface. The desk units are nice and modern-looking but contain thousands of mechanical parts that clatter like old-school mechanical calculators and require the same level of cleaning and maintenance. The sleek and silent floor unit tends to be overlooked, except as a reminder that the desk unit is not actually self-contained.
It is interesting to note that of the three leading US mechanical calculator companies, Friden and Monroe both developed first-generation electronic calculators that were unique and interesting but did not become successful product lines. Friden and Monroe did not continue calculator development after their first attempts, becoming resellers of Japanese machines until these were reduced to commodity prices. At this stage Friden left the calculator business but Monroe continued as a reseller until the 1990s. Burroughs, the third mechanical calculator company, skipped the in-house development stage and sold Burroughs-branded Japanese machines in the late 60s and early 70s and left the calculator business in the late 1970s.