From the vendor:
Completely searchable and easy to use, The Chicago Manual of Style Online provides recommendations on editorial style and publishing practices for the digital age. Now offering the full contents of the 16th and 15th editions, it is the must-have reference for everyone who works with words.
The Chicago Manual of Style Online includes the popular Chicago Style Q&A, a resource that thousands have found entertaining and informative. The Q&A content is fully searchable along with the content of The Chicago Manual of Style. Your queries will return results—clearly distinguishable—from both the Manual and the Chicago Style Q&A. The Chicago Style Q&A also features monthly polls and interviews of interest to anyone who works with words.
Using the features of My Manual, you can add Notes, Bookmark favorite paragraphs, and create Style Sheets to make The Chicago Manual of Style Online your personalized style guide.
Also includes access to the Chicago-Style Citation Quick Guide for help citing sources. This guide provides clear examples of how to use Chicago-style citation.
All subscriptions include access to the full content of the 15th and 16th editions.