Here are the slides from my 2015 Drupal Summit talk, Quality Drupal DevOps!
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If you are a user of business software and are interested in finding out more about open source options for your business or office, you may be a little bit frustrated about the lack of introductory-level information on this topic... The best single source of such information that I have found so far is John Locke's "Open Source Solutions for Small Business Problems." It provides an excellent introduction to the concepts, advantages, and disadvantages behind open-source.