aspect ratio
Definition:
The aspect ratio of an image or other object is simply its width divided by its height. Traditional standard definition pictures have a 4:3 aspect ratio, where 4 represents the width and 3 represents the height. High definition pictures have a 16:9 aspect ratio.
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text message
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.
