There was a study way back of a printing company, I think in MN, four characters like OCCP or something but can't find it. But I did find this: https://www.mnc

There was a study way back of a printing company, I think in MN, four characters like OCCP or something but can't find it. But I did find this: https://www.mnceo.org https://www.mnceo.org Which looks pretty impressive. I wonder how many states have something like this.