0.5.2-b3 - 4/30/200
    More code cleanup with reorganizing libraries
	
0.5.2-b2 - 4/30/200
    Continued code cleanup
	
0.5.2-b1 - 4/29/2000
    Fixed a few MPI bugs
    Better documented, coded raysum in-memory on on-disk options
	
0.5.1 - 4/28/2000
    Cleaned out library that wasn't being used by CTSim	 
    Modified ctsim.cgi to read in configuration file ctsim.conf

0.5.0 - 4/27/2000 
    First open source distribution for GNU/Linux
	
6/1999 
  Converted to GNU/Linux
  added MPI support via LAM library
	
1983-84 
  Developed under MS-DOS and IBM EGA graphics