There is an incredibly wide price range for PDAs, but in general, you get more power and capabilities for your money with a PDA instead of a smartphone.
Answer is CAD
A stylus.
Many phones are PDAs, or you can find older models on eBay.
laptops, PDAs and cell phones
PDA's are protected using the same type of software that protects cell phones.
Infrared ports, or IRDA, are on many laptops, PDAs and some phones. This is just like BlueTooth or Wifi, but slower. Two PDAs can exchange data this way quite easily.
As long as you have a Palm phone, then it should be a smart phone. The original Palm Pilots, however, were just handheld PDAs.
The best phones for a reasonable prices are ones that have Android included. This includes things like the Samsung Galaxy.
The most common forms of PDAs are Smartphones, palm PDAs and pocket PCs.
Cell phones have no business in schools. Social networking and texting(sexting) can wait until after class or after school. It's sad when students carry faster PDAs than the school computers.
Some Examples are: Computers and their Components, Cellular Phones, Smart Phones, Digital Cameras and Memory Cards, iPhones, iPods, iPads, MP3 and MP4 Players, Tablets, PDAs, Flash Drives, Digital Organizers, Types of Printers: Printers, Copiers, Scanners, and Fax Machines; DVD Players and DVDS, VHS Players and VHS Tapes, Televisions, Telephones, Microwaves, Refrigerators, Ovens and Stovetops, Lighting, Electricity...
A personal digital assistant (PDA) is a handheld computer also known as palmtop computers. Newer PDAs also have both color screens and audio capabilities, enabling them to be used as mobile phones, (smartphones), web browsers, or portable media players. Many PDAs can access the Internet, intranets or extranets via Wi-Fi, or Wireless Wide-Area Networks (WWANs). Many PDAs employ touch screen technology.