http://www.wired.com/science/discoveries/news/2004/05/63493

http://www.etoy.com/

from wired: "This week, the art group etoy will issue Semacoded uniforms to 500 children participating in its etoy.Day-Care-2 project at the Nieuwe Domeinen arts and architecture festival in Amsterdam. A quick scan of the uniform would link to the children's Web page with real-time information about them."

Semacodes for daycare, or people tracking. I suppose it's easier to implement than writing their name on each shirt then checking a clipboard?? 1984 written all over this.