The files in this directory are of the following types:
The text "Component Side" should be readable on the Top Layer when fabbed.
The text "PAPERS 960801" should be readable on both sides when fabbed.

960801.pcb   Protel Easytrax 2.05 PCB design file

960801.gtl   Gerber Top Layer 
960801.gbl   Gerber Bottom Layer X-RAY VIEW 

960801.stl   Postscript Top Layer 
960801.sbl   Postscript Bottom Layer X-RAY VIEW 

960801.apt   Gerber Aperture
960801.etl   Tool List (Drill sizes.)

960801.mat   Gerber aperture match file.

960801.txt   NC Drill List in ASCII format
960801.drl   NC Drill List in Binary format

960801.cwk   ??? These three files are binaries that are
960801.apr   ??? used in yet another "portable" PCB file
960801.rck   ??? format.  Try gerberview