What Wikipedia says..
Adobe Illustrator is a vector graphics editor developed and marketed by Adobe Inc. Originally designed for the Apple Macintosh, development of Adobe Illustrator began in 1985. Along with Creative Cloud (Adobe’s shift to monthly or annual subscription service delivered over the Internet), Illustrator CC was released. The latest version, Illustrator CC 2019, was released in October 2018 and is the 23rd generation in the product line. Adobe Illustrator was reviewed as the best vector graphics editing program in 2018 by PC Magazine.