User talk:89.167.129.50

November 2016
Hello, I'm Materialscientist. I wanted to let you know that one or more of your recent contributions to Galeras have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page. Materialscientist (talk) 10:13, 13 November 2016 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself so you can avoid further irrelevant notices.

November 2017
Please refrain from making unconstructive edits to Wikipedia, as you did at Mechanical system. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism can result in the loss of editing privileges. Thank you. Alpha3031 10:41, 5 November 2017 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself or logging in with an existing account so you can avoid further irrelevant notices. — Preceding unsigned comment added by Alpha3031 (talk • contribs) 10:41, 5 November 2017 (UTC)

January 2019
Hello, I'm Oshwah. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Macintosh operating systems— because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help Desk. Thanks.  ~Oshwah~  (talk) (contribs)   11:37, 17 January 2019 (UTC)