Practice Thing 2
I posted a photo of my no-brand Practice Thing a while ago. Victor found this similar device at LeTechnique.

It is much fancier and you can actually tune it, which is very nice.

Which company or individual was the first to join two words together as seen in the title? Was it Apple with their PowerBook or does it date much earlier? Is it a little trick to get something trademarked, like intentionally misspelling a word?