| Numeral systems by culture |
| Hindu-Arabic numerals |
Western Arabic
Eastern Arabic
Khmer |
Indian family
Brahmi
Thai |
| East Asian numerals |
Chinese
Suzhou
Counting rods |
Japanese
Korean |
| Alphabetic numerals |
Abjad
Armenian
Cyrillic
Ge'ez |
Hebrew
Greek (Ionian)
Āryabhaṭa
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| Other systems |
Attic
Babylonian
Egyptian
English |
Etruscan
Mayan
Roman
Urnfield |
| List of numeral system topics |
| Positional systems by base |
| Decimal (10) |
| 2, 4, 8, 16, 32, 64 |
| 1, 3, 9, 12, 20, 24, 30, 36, 60, more… |
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This article is about the positional numerical system. For the content encoding scheme, see Base64.
The base-64 system is a numeral system with 64 as its base. It is the largest power-of-two base that can be represented using single printable ASCII characters. This has led to its use as a transfer encoding for e-mail among other things.
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