This is a list of numeral system topics, by Wikipedia page. It does not systematically list computer formats for storing numbers (computer numbering formats). See also number names.

Arranged by base

• Radix, radix point, mixed radix, base (mathematics)
• Unary numeral system (base 1)
  • Tally mark
• Binary numeral system (base 2)
• Negabinary numeral system (base -2)
• Ternary numeral system (base 3)
• Negaternary numeral system (base -3)
• Quaternary numeral system (base 4)
• Quater-imaginary base (base 4√-1)
• Quinary numeral system (base 5)
  • Pentimal system
• Senary numeral system (base 6)
• Septenary numeral system (base 7)
• Octal numeral system (base 8)
• Nonary (novenary) numeral system (base 9)
• Denary (decimal) numeral system (base 10)
  • Bi-quinary coded decimal
• Duodecimal (dozenal) numeral system (base 12)
• Hexadecimal numeral system (base 16)
• Vigesimal numeral system (base 20)
• Sexagesimal numeral system (base 60)

Arranged by culture

• Arabic numerals
• Armenian numerals
• Babylonian numerals
• Chinese numerals
  • Rod numerals
• Greek numerals
• Hebrew numerals
• Indian numerals
• Japanese numerals
• Maya numerals
• Thai numerals
• Roman numerals

Other

• Algorism
• Goodstein's theorem
• Myriad