Adobe Photoshop is probably the most widely known and commonly used graphics software in the world. In fact it is now so widely known that that the term Photoshop is used as a s verb to describe the act of altering a digital image. Photoshop is fundamentally a pixel editing program. While it has a number of vector editing tools fully featured vector editing is better done with a program such as Adobe Illustrator. By editing the RGB values and position of individual pixels and image can be retouched or altered in a large variety of ways.
This video pushes Photoshop further in to the collective consciousness of the general public. Enjoy!