9jan12 On the dell, when I hit on robot.exe in the sampler, it asks for "glut.dll", not glut32.dll, which I provided. I wonder what we're talking about here. 8oct11 The redbook-sampler is an unzipped version of redbook.zip with a kitche-mac with some examples that do recompiles in OSX10.5 with XCode and OpenGL Whoa ... this directory is dated 1997. It has a lot of .exes in it and no other binaries. Makes me think this was compiled for a PC and was originally from an SGI distribution . The redbook directory contains the examples that come with the OpenGL guide know as the Redbook. There is a readme but it's pretty terse. The various instructions on making a source file needs to be done with some caution.