Smoothing methods for nonparametric regression and density
estimation
Adrian Bowman and Adelchi Azzalini. 
         Ported to R by B. D. Ripley <ripley@stats.ox.ac.uk> up to version 2.0,
	     version 2.1 by Adrian Bowman and Adelchi Azzalini,
	     version 2.2 by Adrian Bowman.
rpanel, tkrplot, rgl, misc3d, akima, gam
This is software linked to the book
  'Applied Smoothing Techniques for Data Analysis -
  The Kernel Approach with S-Plus Illustrations' Oxford University Press.