abacus abjad numerals algorism arabic numerals armenian numerals attic numerals babylonian numerals binary numeral system brahmagupta brahmi numeral chinese numerals constant construction of the real numbers counting rods cyrillic numerals decimal decimal representation decimal separator donald knuth eastern arabic numerals egyptian numerals english numerals etruscan numerals full stop geometric progression georges ifrah greek numerals hebrew calendar hebrew numerals hexadecimal hindu-arabic numeral system india indian numerals japanese numerals javascript khmer numerals korean numerals list of numeral system topics locale maya numerals mongolian numerals non-standard positional numeral systems numeral system octal radix renaissance roman numerals sexagesimal sign-value notation subtractive notation suzhou numerals thai numerals urnfield culture numerals