Conversation so far:
where do we use the binary number system
The most common application for the binary number system can be found in computer technology.
what is the binary number system
In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols.
what is the history of the binary number system
The modern binary number system was studied in Europe in the 16th and 17th centuries by Thomas Harriot, Juan Caramuel y Lobkowitz, and Gottfried Leibniz.

Question: had the system appeared anywhere earlier
Self-contained rewrite: had the binary number system appeared anywhere else earlier