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| P |
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packet |
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A piece of data transmitted over a packet-switching
network such as the Internet; a packet includes not just data
but also its destination. |
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PAN |
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Personal Area Network. |
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PCN |
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Personal Communications
Network. |
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PCS |
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Personal Communications
Service; new digital cell phone systems in 2GHz range; mostly
GSM. |
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PDA |
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Personal digital assistant;
handheld computer or personal organizer device. |
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PDC |
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Personal Digital Communications;
digital cell phone system in Japan. |
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PIN |
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Personal identification
number. |
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P- Java |
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Personal Java; Java API
and specification for running Java applications on small devices. |
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Pocket
PC |
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A handheld Windows-based
computer that runs the Pocket PC operating system (formerly
Windows CE). The Pocket PC operating system (version 3.0 of
Windows CE) adds a new interface along with greater stability,
Pocket Office applications (Internet Explorer, Word, and Excel),
handwriting recognition, an e-book reader, wireless Internet
access, and longer battery life. The Pocket PC was designed
to compete more directly with the popular Palm devices. |
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Polyphonic |
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An electronic instrument
capable of playing more than one note at a time. |
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POTS |
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Plain old telephone service. |
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| R |
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RAM network |
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Earlier name for BellSouth
Network. |
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Ricochet |
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A wireless Internet service
from Metricom Incorporated, based in Los Gatos, California.
It uses appoximately 100 small "microcell" radio transceivers
attached to utility poles within a 20-square-mile cell. Each
cell has one wired access point, which is a T1, frame-relay
connection to the Internet. Each microcell bounces digital signals
from the mobile devices to other microcells and eventually to
its wired access point. The transceivers in this MicroCellular
Data Network (MCDN) employ 162 frequency-hopping channels in
the 902MHz to 928MHz band from user to microcell. The 2.4GHz
band is used in the rest of the system, and licensed spectrum
in the 2.3GHz band is used for its high-speed service. Rocochet
modems attach to laptops and other handhelds via the serial
port.
Ricochet 1 provides 28.8kbps service with access primarily
to stationary users, while Ricochet 2, introduced in 2000,
offers 128kbps for the commuter in transit. First deployed
in Washington D.C., Seattle, and Silicon Valley, coverage
in more than 40 urban areas is expected by 2002.
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RS-MMC |
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Reduced Size MultiMediaCard. |
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| S |
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SD
card |
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SecureDigital card;
a highly secure stamp-sized flash memory card. |
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Series
40 |
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Symbian OS platform
for mass market Java technology-enabled mobile devices. |
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Series
60 |
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Symbian OS platform
for smart phones with Java technology capability. |
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Series
80 |
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Symbian OS platform
for enterprise devices. |
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short
messaging |
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Sending small text messages
to cell phones; GSM pioneered Short Message Service (SMS), now
used in all digital cell phones. |
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SIM |
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Subscriber Identity Module. |
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SIM card |
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Smart card that gives
GSM phone its user identity; lets phones be easily rented or
borrowed. |
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SM |
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Short Message. |
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SMS |
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Short Messaging Service;
GSM coined the phrase, but similar text messaging is used in
most digital cell phone systems. |
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SMTP |
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Simple Mail Transfer Protocol. |
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Symphony |
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Wireless LAN geared for
the home from Proxim. |
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Symbian |
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Symbian owns and
develops the Symbian operating system that is optimized.
for mobile terminals, such as communicators and smart
phones. |
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