HTML and CSS Reference
vendor, these devices provide a high-quality browser that may include
many of the features you would normally find in a desktop browser. The
end user can upgrade or extend the browser with relative ease. Other
network applications, such as email and FTP, may be available as well.
PDAs typically rely on the Institute of Electrical and Electronics Engin-
eers (IEEE) standard 802.11, commonly known as WiFi (pronounced
"why fie"), for wireless Ethernet-based connectivity with a network and,
ultimately, the Internet. Some PDAs use Bluetooth, an alternative wire-
less technology, to connect with another network device, such as a mo-
bile phone, laptop computer, or Bluetooth network access point, in order
to ultimately connect with the Web.
220.127.116.11. Convergence devices
Convergence devices attempt to marry the convenience of a mobile
phone with the flexibility and power of a PDA. They use cellular network
connectivity, but may also offer 802.11 networking, as well. They can
run most applications available to PDA users and provide some integ-
ration between the PDA experience and conventional telephony fea-
tures. Convergence products are currently offered by PalmSource (run-
ning Palm OS and Windows Mobile) and various cellular phone manu-
facturers (running Windows Mobile). Convergence devices offer distinct
compromises between the PDA experience, with its larger screen and
computing power, and mobile phones, with their small form factor and
ease of use.
14.1.2. Cellular Access
In addition to the device type, users can choose from a number of ac-
cess plans that allow their mobile device to connect with the Internet.
As with mobile devices, hundreds of access plans are available, but they
can generally be categorized into a few common groups.