 MGB alumni hold some of the key positions at IT world leading companies such as Oracle, Siemens, IBM, or Serbian and European brands Saga , Informatika , CET , or Comtrade.. Comtrade is owned and managed by MGB Alumni.Mathematical Grammar School is very proud of success its students achieved throughout the School's 45 years rich history.Trophies won and medals are numerous, and come from many different sport disciplines.