How to correctly name categories on a blog: 1. RegEx or RegExp; 2. CMD, Console or Terminal?

Question

Blogs

Good afternoon!
The question is a bit odd. What is the correct name for the categories in your cheat sheet blog?
To store regular expressions:
RegEx
or
RegExp
To store commands like " $ grep -v "^$" file.txt":
CMD
Console
Terminal
Thank you!