Earlier quoted context omitted.
I don't know about three letters but two letters cannot be trademarked. The exact point is that WordPress cannot do anything legally, and that's understandably frustrating.
But until the last few weeks the Wordpress site enthusiastically endorsed its use by third parties. It wasn’t “we really wish you wouldn’t”.
> The abbreviation “WP” is not covered by the WordPress trademarks and you are free to use it in any way you see fit.
It was changed to its current spiteful text on September 25.
http://web.archive.org/web/20240919043912/https://wordpressf...