/etc - from an authoritative source (Score 1)

According to Brian Kernighan and Rob Pike:

/etc (et cetera) we have also seen before. It contains various administrative files such as the password file and some system programs such as /etc/getty,....

. Quoted from

The Unix Programming Environment

, Prentise-Hall, Copyright 1984 by Bell Laboratories. Original hardback published in 1978. If you've never heard of Brian Kernighan, you need to study the history of "c" and Unix(tm).