Over one hundred of these legacy custom-built Programmable Logic Controller (PLC) based systems were sold by Howman Controls starting in the late 1980s. A testament to the durability of industrial control systems, many of these original tally frames are still in daily use around the world, and they are still fully supported by TallyEngine, LLC.

Beyond basic maintenance and support services, the original DOS-based tally matrix software can be upgraded to a modern Windows GUI, or the Tally4 frame can be slaved to a TallyEngine to provide complete integration of Tally, GPIO, Router, MultiViewers and UMDs.