Illustrator was released in 1986, CorelDraw in 1989. I'm not sure why QuarkXPress is included (it is a page layout/desktop publishing tool, not an illustration

Illustrator was released in 1986, CorelDraw in 1989. I'm not sure why QuarkXPress is included (it is a page layout/desktop publishing tool, not an illustration tool), but it was released in 1987. Postscript became popular[1] well before any version of the PDF format existed. It was popularized by the Apple Laserwriter, the first printer to natively support it. [1] Well, I suppose it depends on what one means by 'popular'. I think creating the desktop publishing industry counts; YMMV.