This site lists expanders, tells a bit about what each of them does and what they work with, and gives links to the suppliers' pages --
http://home.earthlink.net/~agjon/list.htm
I use Shorthand and love it. It doesn't have all the features of Instant Text, but because of the transcription program I use I needed something that doesn't take up a lot of memory or disc space. In my next incarnation, I would love to try IT.
Incidentally, in Shorthand as well as in IT, you can have different dictionaries for different specialities or even for different docs.
This site will give you some ideas about creating your abbreviations so that you can "remember" them without thinking too much. I have several thousand, and have no problems.
http://home.earthlink.net/~agjon/abczrule.htm
HTH
