 Chris Toumey, a cultural anthropologist at the University of South Carolina, has reconstructed the history of the publication and republication of Feynman's talk, along with the record of citations to "Plenty of Room" in the scientific literature.In Toumey's 2008 article, "Reading Feynman into Nanotechnology", he found 11 versions of the publication of "Plenty of Room", plus two instances of a closely related talk by Feynman, "Infinitesimal Machinery", which Feynman called "Plenty of Room, Revisited" (published under the name "Infinitesimal Machinery").Also in Toumey's references are videotapes of that second talk.