"I wanted to understand where it came from." — Ginni Rometty
Let's try running the following command to list all hidden files ending with 'rc' in your home directory:
[user@personal ~]$ ls -la ~/.*rc -rw-r--r-- 1 user user 412 Mar 25 11:15 /home/user/.bashrc -rw------- 1 user user 24352 Apr 2 09:31 /home/user/.pinerc -rw-rw-r-- 1 user user 22 Apr 1 19:05 /home/user/.vimrc
rc in these files stands for run commands.