April 2015

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Hello, and welcome to Wikipedia. This is a message letting you know that one or more of your recent edits to Operating system has been undone by an automated computer program called ClueBot NG.

Thank you. ClueBot NG (talk) 09:32, 10 April 2015 (UTC)Reply

May 2015

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  Please do not add or change content, as you did at Numerical error, without citing a reliable source. Please review the guidelines at Wikipedia:Citing sources and take this opportunity to add references to the article. Thank you. --Edcolins (talk) 11:03, 1 May 2015 (UTC)Reply