The question is, how is this flippin' useful? In a reference manual? Who writes documentation like this?
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Suddenly we know a lot more! What happened in May of 1989? (Aside from me passing my first college programming course.) That's right -- the shuttering of Infocom as a Cambridge studio.
This quote from the manual is great:
EXERCISE THREE Design and implement a full-size game. Submit it to testing, fix all the resulting bugs, help marketing design a package, ship the game, and sell at least 250,000 units.