pager -
A computer program running in a text terminal, used to view but not modify the contents of a text file moving down the file one line or one screen at a time.
Wikipedia
A pager (sometimes called a page, beeper, bleep or bleeper) is a simple personal telecommunications device for short messages. A one-way numeric pager can only receive a message consisting of a few digits, typically a phone number that the user is then expected to call. Alphanumeric pagers are available, as well as two-way pagers that have the ability to send and receive email, numeric pages, and SMS messages.
