Revision #6 → #977 · back to history
addedAbacus (structure)184b9845e75e
addedRod as positional digit76d2ef0df133
addedBi-quinary coded decimal layout19913f0b2cc5
addedSupported arithmetic operations500d7e23580f
addedSumerian sexagesimal columns7e9fa10de6b9
addedRoman abacus groove values31285d3b7fa9
addedSuanpan bead systema7184031369f
addedTop and bottom bead valuesae60948f45c8
addedHexadecimal capability64ae6500555d
addedSchool bead frame unit valueb2be89e621c0
addedRepresenting 42dbdea33b165b
addedMultiplying 6 times 71d15569ab1cc
addedBinary abacus switch8441228eaf04
addedNepohualtzintzin base-20 system289c436ee031
addedBead values per rowa200c6ed8857
addedUpper-row multiply-by-20 rulee1c185a2e55a
added13 rows of 7 beadsef78bea6c05b
addedNepohualtzintzin day countsf339293e45e2
addedYupana Fibonacci place values21d95efe48c2
addedAbacus-based mental calculationf4c2bb1b9d07