I founded Edgework, Inc. as an outgrowth of The Binary Tree, a computer learning center I founded in 1980. Edgework was the software development and product entity for software and courseware I developed at the center. During that time I collaborated with Steve Gibson of Gibson Research on educational software products that utilized his "light pen" for the Apple II computer. Steve Gibson also created a light pen for the Atari computer and Atari awarded me two contracts for educational software using the Atari light pen. I wrote a book of activities for students and teachers based on the children’s programming language Logo. Prentice Hall published "Apple Logo Activities" in 1984."