On Wed, Jul 15, 2009 at 1:19 PM, Morris Dovey<mrdovey at iedu.com> wrote: > > Heh. In a pinch paper tape is also human-readable, and it's the easiest > media to build a Q&D reader for (needs only 1 LED and 9 photo detectors) But what if we no longer have photons. What then?! Colin