Accum is an intelligent, planet friendly adding machine with the functions you expect from a mechanical adding machine plus capabilities associated with a Windows environment. Features include, but are not limited to continuous tape, calculator and 10 key modes, running subtotal, 100 memories (99 of which you name), changing tape entries, one key sales tax, non-volatile memory, saving tape to disk, copying tape entry or entire tape to clipboard, tape captions, auto decimal, collapse mode, stopwatch, timed events for testing proficiency. The timed event is particularly useful in an educational or training environment where 10-key skills are being taught.