Hello, I'm Piguy101. I noticed that you made a change to an article, Object-oriented programming, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you. Piguy101 (talk) 17:42, 3 July 2014 (UTC)
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