User:Zzo38
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Z-machine Reference Card: (Source) (Binary)
I wrote the "Zork Machine Interpreter and Debugger" and "JavaScript Z-Machine".
My contributions of IFWiki are made explicitly in the public domain by this message. If this is not possible, it is licensed under CC0 (Creative Commons license which includes a public domain dedication and a fallback which is mostly like public domain otherwise) or Unlicense or WTFPL, at your choice.