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A wireless device that, when activated, signals the bearer to contact either a predetermined party or the party indicated on the device itself. Often called a beeper for the annoying beeps some pagers use to alert their owner.
In recent years, pagers have grown more complex, allowing for long alphanumeric messages to be received and scrolled though (as opposed to earlier models, which supported only short numeric messages); at the same time as pager functions are integrated into some PDAs. If this trend continues, the distinction between PDAs and high-end pagers will disappear.
Short Message Service allows a mobile phone to display a message, just like an alphanumeric pager.
The best known pagers are more, less, pg and list.com.