In my line of work I see more bar codes than most people, and probably know more than is healthy for anyone about all the types of codes & what makes them go. But this guy, Scott Blake, has put a new twist on the whole works, using bar codes for all manner of fun stuff.
Actually, there is some fun that can be had with bar codes and other types of ID codes. The code at the top of this post is a Data Matrix (ECC-200) that has the words “Gadgetopia “Geek and you shall find…” encoded. The Data Matrix can contain up to 256 alpha-numeric characters, so there is a lot you can stuff into one. A guy I used to work with would occasionally leave messages in DM codes… Only effective if the other side has a 2D-capable scanner. And a conference I went to a while back had name tags with the names in DM codes. (OK, so that sounds lame; I guess you had to be there.)