The application would not be half as successful without a few very useful
features of Tcl/Tk and the TclX extension. In particular, the grid geometry
manager is a very welcome new Tk feature which significantly reduced coding
time; arrays of keyed lists (tclX) are a perfect analogue to database tables
and hence are heavily used in most of my code. Tcl and TclX list functions, and
expression evaluation, were essential. TclX's package/library system has
been very useful and appropriate for code maintenance.
Much thanks to Mark Diekhans and Karl Lehenbauer (TclX), W. F. Lupton (ktcl), T.Poindexter (sybtcl), G. Howlett (BLT), P.-L. Bossart (tkTurnDial), and the original authors of the VU widget set (F. Gardner, L. Miller, R. Dearden of VU Wellington, NZ). Thanks also to Steve Allen (FITS expertise and KTL code porting) and the rest of the DEIMOS team for their ongoing suggestions and challenges. And as always, thanks to Per Cederqvist and friends for CVS!