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Joined: Jan 2005
It's from an HP 2645 terminal, which was used with HP 3000 series minicomputers. This was an intelligent terminal (it had an 8080 microprocessor built in) and could run programs; some models had a built-in cartidge tape drive (hence the tape controls on the keyboard). HP used to distribute tapes with games, like Pong, that could be loaded and run on these terminals. A company called AICS Research used these terminals to build a word processing system that they called "The System 2000 Word Processing Terminal." You can go to http://www.aics-research.com/emulate.html to see a picture of one of these.
The date code should be 1977; the baud rate settings are not for a modem, but for a direct connection to an HP 3000 computer. The "Roll Up" and "Roll Down" keys are for scrolling the screen display up and down.