I believe that you are thinking of the Dewey Decimal System.
binary
Binary.
No, it does not have a name. The name "solar system" is the only thing we call it. It does NOT have a specific name. But, constellations in the solar system do have specific names. No, it does not have a name. The name "solar system" is the only thing we call it. It does NOT have a specific name. But, constellations in the solar system do have specific names. No, it does not have a name. The name "solar system" is the only thing we call it. It does NOT have a specific name. But, constellations in the solar system do have specific names.
just numbers only
No!
prime numbers
prime numbers are numbers that can only be multiplied by 1 and itself...... Examples:17,19,23,31,37,38,39,etc......
binary system
Digital electronics devices handle numbers in the form of the binary system. That is, the numbers are represented in base-2, with only two digits. That way, when a digit comes along, it's much easier for the electronic device to decide what digit it is.
A semi-prime.
1979.
binary system