http://www.cadhistory.net/13%20IBM,%20Lockheed%20and%20Dassault.pdf http://www.cadhistory.net/13%20IBM,%20Lockheed%20and%20Dassa... another likely inflexion po

http://www.cadhistory.net/13%20IBM,%20Lockheed%20and%20Dassault.pdf http://www.cadhistory.net/13%20IBM,%20Lockheed%20and%20Dassa... another likely inflexion point was the introduction of CADAM around the period