This is a much more interesting article than I expected. Covers the entire history of 3.5mm, 1/4", and other types of phone plugs and jacks, including the appl

This is a much more interesting article than I expected. Covers the entire history of 3.5mm, 1/4", and other types of phone plugs and jacks, including the applications we all know of and a bunch I never heard about before.