- https://www.os2world.com/
- https://www.ecomstation.com/
- https://ecsoft2.org/
- https://www.vice.com/amp/en_us/article/zmp8gy/the-forgotten-operating-system-that-keeps-the-nyc-subway-system-alivehttps://www.vice.com/…. {WA}
- http://meiobit.com/98849/os2-25-anos-o-sistema-que-foi-sem-nunca-ter-sido/http://meiobit.com/…. {WA}