More Audio Gadget History

This is for those of you that enjoyed my post titled The Short History of Audio/Video Technology. The Advance of Audio Apparatuses is a poster that shows pictures of audio gadgets from 1840 to the present. I don't think it's representative of the most significant audio inventions, but it gives you a pretty good overview. Of the whole chart, I think I've owned only 2 of the illustrated gadgets - the Sony Walkman and the Sony Discman. Although, I did buy my daughter's iPod Touch and iPhones.