On Jan 28, 2008 5:59 PM, Michael Vanier <mvanier at cs.caltech.edu> wrote: > PLT is actually a triply-recursive acronym, where the "P" stands for "PLT", the "L" stands for the > middle letter of "PLT" and the "T" stands for the last letter of "PLT". There you have it. (P) -> P.L.T. (L) -> Language (T) -> Tools