PDAs come in many shapes

PDAs come in many shapes, sizes, memory configurations and application bundles. Only 2 operating systems: Palm or Windows CE. Compare systems.
PDA Resources From UIC Medical Library Medical / Health Sciences Resources for PDAs (Personal Digital Assistants) Good resource for basics PDA information and uses in Health Science
What are you going to use it for? - Minimal user Web source - Dental student Web source
What features or add-ons (e-mail, internet) may help? Dental Office use. Web source. Dental School use. Creating and Listening to MP3 Audio Files from Journals.