In Adobe terminology, the version number corresponds to the software release. is the native file format for Adobe Illustrator CS6 (Creative Suite 6), released in 2012.
2012
Introduced a dark user interface (similar to Photoshop) with adjustable brightness, designed to reduce eye strain and keep the focus on the artwork itself. Understanding the .ai File Format (Version 16) adobe illustrator artwork 16.0
A dedicated, interactive workspace was added for creating seamless, repeating vector patterns, which previously required manual, tedious tiling. In Adobe terminology, the version number corresponds to