The add-on for Feds that I wrote in 2015 for a big university clinic in NY state, and was then sold to 3-4 others (the count is kind of fuzzy, because at least one of them has more than one clinic).
It's a regrind-shit data mulling required in NY and soon probably elsewhere, that there aren't any paper prescriptions anymore. Your good old doc has to have a computer and subscribe to a prescription handler, who then checks whether it's a controlled substance (in which case more paperwork is required, one more signature at least), and then creates the actual prescription from the data doc entered, and sends it to the designated pharmacy. Via fax or email or whatever the protocol they have.
Now CopyRx, the partner which David picked for this is one of those who have grown too fast and got bureaucratized even before their product was stable and ran smoothly. It's obvious from the way the same things are called different names - one set of names in the actual code; another one in the documentation, and yet another in email and other exchange with them. And then we never got a liaison officer - we got a fresh one every few weeks, and the poor creature didn't know jack about us and what we do and why are we the only guys hooking into their API from a fat client, not from a web server. Had to learn how to cram the few basic facts into anyone's head in two minutes.
There's an obvious bug in their code: they require separate fields for home phone, work phone, cell phone. But on the prescription they print only home phone. Now with so many people having no phone line, including medical tourists, we get the complaint that the prescriptions get printed without phone number. We told them about this as early as october 2015; it's now 2018 and this isn't fixed, even though they went several versions ahead. They keep adding the screen candy, but lose features which were actually good. Oh well.
I'm keeping Nederlands as the country for everything related to Feds, just because it originated there, even though Firriver is mostly registered in Canada.