Many professionals are reaching for their handheld computer or personal digital assistant (PDA) as their business instrument. PDA are valuable practice tools. With the PDA you can write down appointments on your calendar or look up phone numbers in your address book, you see other people everywhere (in business meetings, at the airport, around the supermarket) scribbling things on a device that is about the size of a small calculator or maybe the size of a paperback book. They have traded their calendars and address books for a personal digital assistant, or PDA, a remarkable, tiny, fully functional computer that you can hold in one hand. And unlike that paper organizer, a PDA can hold your downloaded e-mail and play music. This article will provide an overview of PDA and also talk about the features and trends.