User:Difference engine
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Hello, I'm Difference engine (diff for short). I've been on Wikipedia since 2006, but I have only really been active since 2014. I mostly work on articles related to history, particularly Chinese history. I also upload photographs to Wikimedia Commons, both my own and public domain works from the web. If there's anything in the Washington, D.C. area you need a picture of, feel free to request it on my talk page.
Unified login: Difference engine is the unique login of this user for all public Wikimedia projects.
Difference engine
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