Sony Ericsson K220 White Paper page 38

and memory for a personal directory of numbers.
The card can be a small plug-in type or credit card-
sized, but both types have the same functions.
SMS
Short Messaging Service. Allows messages of up
to 160 characters to be sent and received via the
network operator's message centre to a mobile
phone.
SS
Supplementary Services
SSL
Secure Socket Layer
UI
User interface
URL
Uniform Resource Locator. The global address of
documents and other resources on the World Wide
Web.
USSD
Unstructured Supplementary Services Data. Nar-
row-band GSM data service.
VGA
Video Graphics Array. Graphics standard intro-
duced by IBM, with a resolution of 640x480 pixels.
WAP
Wireless Application Protocol. Handheld devices,
low bandwidth, binary coded, a deck/card meta-
phor to specify a service. A card is typically a unit
of interaction with the user, that is, either presenta-
tion of information or request for information from
the user. A collection of cards is called a deck,
which usually constitutes a service.
WBMP
Wireless BitMap.
A graphic format optimized for mobile computing
devices.
WML
Wireless Markup Language. A markup language
used for authoring services, fulfilling the same pur-
pose as HyperText Markup Language (HTML) does
on the World Wide Web (WWW). In contrast to
HTML, WML is designed to fit small handheld
devices.
WSP
Wireless Session Protocol
XHTML
Extensible HyperText Markup Language
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White paper K220
February 2007