http://citeseer.ist.psu.edu/ousterhout90tcl.html
2012-06-25 HJG It looks like access to that document needs a login ?
[Explain JO, Tcl, and Usenix, as well as chronology more generally.]
LV I suspect that there is a version of this paper on Dr. O's web page as well - and I would have to guess there's one over at http://www.tcl.tk/ as well.