Cell phone Computer Ipod (If you have the app) PDA
PDA's can be connected to a computer. Files can be transferred from the PDA to the computer and from the computer to the PDA. Data such as phone numbers, addresses and appointments can be synchronized between PDA's and computers so the information can be the updated.
It would usually be called "Address Book", though it could vary depending on the operating system of the PDA.
A PDA Sat Nav is used to store information, files, read emails and provides a navigational system. This is different from the GPS as the GPS is used more for travelling long distance.
Address Book
PDA store apllication programs and data in ROM
They keep your information like phone numbers, addresses and way more.
PDA is often used to stand for Public Display of Affection. However, when talking about electronics, PDA refers to Personal Digital Assistant. A Sprint PDA is purchasable at one's local Sprint store.
One can purchase a PDA GPS from online retailers such as Amazon, or the alternative would be to go to a brick and mortar store such as Best Buy. If one wants to save money, they could check for used PDA's in the sell section of their local newspaper.
One can purchase a PDA organizer online at Amazon, eBay or at some office supply store such as Office Depot. The retailer Best Buy also has this item in store.
Staples, eBay, Amazon, and Best Buy are some businesses that sell electronic PDA's. Target's website, and store, is another way in which someone could purchase a electronic PDA.
B and C only