text message
Definition:
A text message is a short (160 characters or less) message sent between two mobile phones. Text messaging is available on most digital mobile phones but depending on your calling plan you may incur additional per message charges to send and receive text messages.
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480p
The "480" part of 480p describes the number of vertical lines that make up a television or video signal. Most television or video signals are rated at 480, 720 or 1080. The more vertical lines that make up the picture, the crisper or higher definition the picture. The "p" following 480 indicates that the video display is constructed using a progressive scan method.
Many standard definition DVDs are published in a 480p format.
