Significats de non-proprietary en anglès

Dreamhost is not replacing Procmail with Maildrop or Sieve or another non-proprietary tool.

Prior experience told him that Forecast Analytics was usually about a day ahead of the mainline, non-proprietary feeds.

France and Germany want the European Commission to soften the separation rules for non-proprietary trading to avoid crimping the flow of credit.

What is not reassuring is the prospect of the world being divided into proprietary and non-proprietary telephone systems that can't talk to each other.