Halloween Memo I Confirmed and Microsoft's History on Standards
When Eric Raymond published the first Halloween Memo, "Open Source Software: A (New?) Development Methodology", some wondered if it was authentic.
Later, Microsoft sort of confirmed the authenticity in its own style ("Although Microsoft has not attempted to perform a line-for-line review of the posted documents, they do appear to be confidential Microsoft documents with annotation, sent internally to select staff and management on Aug. 11, 1998").
We need wonder no more. Vinod Valloppillil's paper, "Open Source Software: A (New?) Development Methodology, v. 1.00" has appeared as an exhibit [PDF] in Comes v. Microsoft. I'd say that authenticates it once and for all.