proprietary software

• Bill Gates of the recently formed Microsoft, wrote an open letter to the community where he made a point by point argument for the relatively new concept of proprietary software up to that point, the practice of computer users had been to freely pass around software
  وفي رسالة اخبارية للنادي في 31 كانون ثاني 1976 قام "بيل قيتس" رئيس مايكروسوفت المنشأة حديثا بكتابة رسالة الى الجمهور