1.)  What was Photoshop based off of in traditional photography?
Digital version of a dark room

2.)  Who were the two people that combined knowledge to create Photoshop?
Thomas and Glen Knoll

3.)  What year was Photoshop 1.0 released?
1990

4.)  What feature was added to Photoshop 2.0?
The Path Feature

5.)  When was the layers feature introduced and what are layers?
1994 and the layers are the Adjustment layers and the Macro layers

6.)  When did the unification in the Photoshop interface happen?
1996

7.)  When did the lasso selection tool and the history feature appear?
1998