On February 19, 1990, an unknown software product called Photoshop arrived on store shelves, offering entirely new ways for professional photographers and designers to modify and create digital images. At the time, its creators could never have imagined just how influential Photoshop would become, eventually being used in industries as diverse as publishing, advertising, fine art, web design, film, medicine, law enforcement, fashion, government, video games, and countless other fields. This interview is with Thomas Knoll who co-created Photoshop with his brother, special effects pioneer John Knoll, about the worldwide phenomenon that the brothers’ team effort has grown into and just how, exactly, it all began, twenty-five years ago… via…