I have seen several suggestions to get a good PDA with good drug software. My question is what software should I get and is a PDA really necessary. Which is the best PDA and are they MAC compatible? I used to have one, but I just found it inconvenient. How often do you use it in the OR and for those of you who don't have one what do you do?What about a blackberry? Any feedback would be helpful. Thanks as usual.