Indo-Arabic.
Trinary would be the name of a base 3 number system.
The American number system is called the Hindu Arabic system and is the numbers 0123456789
For the decimal number system . . . 'Ten'. For the binary number system . . . 'Two' For the octal number system . . . 'Eight' For the hexidecimal number system . . . 'Sixteen' . . etc.
A number system used to represent any number by a 1 or a zero is a binary system or a base 2 number system.
binary system
Roman Numerals
binary
Because if it were not, then the name of the system would have to be changed.
Arabic number system.See Where_did_the_Australian_number_system_come_fromand What_is_the_name_of_the_English_number_systemfor related information.
The binary system is the name given to the base-2 number system.
decimal
The number system used by the Greeks in the first millennium was called Aegan System. Attic Numerals was later formed on which the Roman System was built. The Attic Numerals used the first letter the name of the number the represented.