User's Manual

Terms and definitions 185
USB
Universal Serial Bus. A plug-and-play interface between a
computer and add-on devices (such as audio players, joysticks,
keyboards, phones, scanners, and printers). With USB, a new
device can be added to your computer without having to add an
adapter card or even having to turn the computer off.
USSD
Unstructured Supplementary Services Data. Narrowband GSM
data service. For example, entering *79*1234# might return the
stock price for stock 1234.
vCal; vCalendar
vCalendar defines a transport and platform-independent format
for exchanging calendar and scheduling information for use in
PIMs/PDAs and group schedulers. vCalendar is specified by
IETF.
vCard
vCard automates the exchange of personal information typically
found on a traditional business card, for use in applications such
as Web mail, voicemail, Web browsers, phone applications, call
centers, video conferencing, PIMs /PDAs, pagers, fax, office
equipment, and smart cards. vCard is specified by IETF.
VGA
Video Graphics Array. Graphics standard introduced by IBM,
with a resolution of 640 x 480 pixels.
VPN
Virtual Private Network. A private network that is configured
within a public network. A VPN appear as private national or
international network to the customer, but physically shares a
backbone trunk with other customers. VPNs enjoy the security
of a private network via access control and encryption, while
taking advantage of the economies of scale and built-in
management facilities of large public networks. Today, there is
tremendous interest in VPNs on the Internet, especially due to
the constant threat of hacker attacks.
WAP
Wireless Application Protocol is a specification for a set of
communication protocols to standardize the way that wireless
devices, such as cellphones and radio transceivers, can be used
for Internet access, including email, the Web and newsgroups.
WAV
A Wave file is an audio file format, created by Microsoft, that
has become a standard PC audio file format for everything from
system and game sounds to CD-quality audio. A Wave file is
identified by a file name extension WAV (.wav).
WBXML
Wireless Binary Extensible Markup Language.