http://wiki.answers.com/Q/What_are_the_advantages_and_disadvantages_of_adobe_illustrator"
John and Thomas Knoll invented adobe Photoshop.Adobe Illustrator is based on so-called Bézier curves.
It depends entirely on the project - Photoshop is an image and graphics creation and editing tool, based on pixel files. Illustrator is an original artwork and design program that is based on vector...
If you bought it. If you download it illegally, you can be sued by illegally.
Anchor points are the points where you can select this point and change shape or size of line for example.