MODION/IDL software Release Notes: Development started in 1995, by Frank Varosi, T.Lanz, A.Dekoter, I.Hubeny @ NASA/GSFC. June 1995, released version 2: Can select subset of energy levels and build bound-bound transitions, and approximate cross-sections for bound-free transitions. November 1995, released version 3.1: Can merge energy levels into superlevels and build bound-bound transitions, and automatically merges corresponding x-secs into superlevel x-sec for constructing approximate bound-free transition x-secs interactively. May 1997, released version 3.2: Fixed bugs involving the merging of many x-sec arrays when many energy levels are merged into one superlevel. (counter of freqs changed from short to long integer).