HP-21 - Wikipedia

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File:HP-PC-Workstation-X-Class 21.jpg - Wikimedia Commons

HP-21

I would like to talk about nethack/roguelike games

File:HP-HP1000-21MX-Computer 14.jpg - Wikimedia Commons

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HP-21 - Wikipedia

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File:HP Dev One.jpg - Wikimedia Commons

File:HP-HP9000-433s-Workstation 21.jpg - Wikimedia Commons