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Or a recent job posting I saw for a Java tech lead:

Required:

Java

Open source technologies

Microsoft Visual Studio

This reminds me of a job posting I found around 2004, which had as requirement "at least 5 years of experience with C#"

Or job postings in 2009 which required at least 3 years of experience with iOS development.

Not that impossible. Maybe they were trying to poach Apple employees. :)