Samsung SGH-E317CSACIN - Manual (Page 213)

Glossary
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provides delivery of user-created content from phone to phone.
The message addressing used is primarily phone numbers, thus
traffic goes from phone to phone. MMS also provides support
for e-mail addressing, so that messages can be sent by e-mail.
In addition to the text content of SMS, MMS messages can
contain still images, voice or audio clips, and also video clips
and presentation information.
Multi-party Calling
Ability to establish a conference call involving up to five
additional parties.
Phone Password
Security code used to unlock the phone when you have selected
the option to lock it automatically each time it switches on.
PIN (Personal Identification Number)
Security code that protects the phone/SIM against unauthorized
use. The PIN is supplied by the service provider with the SIM
card. It may be a four to eight-digit number and can be
changed, as required.
Proxy Server
A server that resides between a web client, such as a web
browser, and a real Web server and acts as an intermediary
between them. When some people browse a web site, their
browser is not actually connecting to the web server. The
request from their browser goes to a proxy server, and the
proxy server makes the request to the web server.
A proxy server can improve performance for groups of
users because it cache the results of all requests for a
certain amount of time. If a user requests a web page that
it already fetched for another user, it returns the page
instead of forwarding the request to the Web server, which
can be a time-consuming operation.
PUK (PIN Unblocking Key)