XpresSpa Group Inc (XSPA)

[anonymousness]

BUT WAIT

He needs a Roman model, not the oriental kind*

. One example of archaeological evidence of the Roman abacus, shown here in reconstruction, dates to the 1st century AD. It has eight long grooves containing up to five beads in each and eight shorter grooves having either one or no beads in each. The groove marked I indicates units, X tens, and so on up to** millions.** The beads in the shorter grooves denote fives –five units, five tens etc., essentially in a bi-quinary coded decimal system, obviously related to the Roman numerals. The short grooves on the right may have been used for marking Roman ounces. "wikipedia"


I learned on an oriental bead model
not a 1960's casio *(oriental kind)
I now use a casio fx300ms scientific calc.
NEW CASIO'S for all Federal Courts who work with numbers bigger than lunch money