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IBM PS/2 Port Card.
Advanced Port Card for Connection of Asynchronous Terminals like VT100/VT220 and others, used to add 'dumb' terminals to Unix, Xenix, etc. systems.
It is also compatible with various Linux systems, as well as DOS, OS/2, and Windows.
Bus Type: IBM PS/2 MICROCHANNEL.
Manufactured: Digiboard.