I created this as a visual aid for students learning to read pitches on the Treble Clef. I extended the range to cover as many instruments as possible.
I printed up a copy of this on my computer at home and then took it to a local print shop and had them blow it up to poster size. I have it hanging on my wall as a quick reference for students in my class. I've also made personal copies of it to hand out to students for their own use.