I used one of these back in my lawyer days. It was helpful, but manually entering all the shortcuts ate up some time. It would be nice if you could input a document and have it suggest (1) what words you should abbreviate and (2) what would be good abbreviations for those words.
That would be fun. Or have a program basically be a key logger and suggest words for you daily or something so it grows the more you use it. Maybe it could have a training mode too to ensure abbreviations don’t fall out of your mind.
