photoshop tutorial: Logos Photoshop through the ages

Here is the evolution of the logo and Photoshop features from version 1 to version CS6 :

1990 : Photoshop 1
Photoshop's developers, Thomas and John Knoll began development on Photoshop in 1987. Version 1 was released by Adobe in 1990. The program was intended from the start as a tool for manipulating images that were digitized by a scanner, which was a rare and expensive device in those days.