What's a "discriminator tap"?
Obviously, that's a joke. But, common terms such as SDR and DSD should not need defined. If there is any question on what they are, there is Google or the RR WIKI. Oh, maybe I need to define WIKI....

And Google...

And RR...
Oh, and my English teachers never said it's not appropriate to use common acronyms. That, is, AFAIK.
Now, if you will notice RR even defines that one if you hover on it. Maybe you could submit a list for them to add, Rog.