Fran, I have been using AviSys for quite a few years now -- started with the DOS version that didn't even permit use of a mouse (!). At the time I was using a very clunky program called AVES and was faced with converting all of my records from that into AviSys. It took me quite a while and lots of patience (fortunately I was not much of a lister then or I would have never succeeded). If you have a lot of records to convert, then AviSys is not the program for you. I've read rave reviews about Thayer's but understand that it is slower (see Benchmarks...on the AviSys web site) in some of its functions than AviSys which runs like lightening on my now aging (all of three years old) computer. I was impressed by the fact that Thayer's does offer to convert other programs into its own format -- a real asset. I don't know about the support Thayer's offers (or how often you would need it), but AviSys support is superb. I also like the way AviSys does Census Reports -- by month, year or 10 year. State checklists are included and you can also create your own custom checklists for areas that you frequently bird (I have a Flag Ponds custom checklist created as well as a Calvert County checklist, etc.). There is a good demo of the features of AviSys on the home page (http://www.mindspring.com/~avisys), but again, there is no conversion program, so it is not for those who have huge numbers of sightings in another program. Arlene ///////// | || Arlene Ripley | 0 || aripley@nestbox.com | || http://www.nestbox.com ||