Open Systems Adapter

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The Open Systems Adapter (OSA) is a network controller for IBM z/Architecture, ES/9000 and S/390 mainframes. The OSA can be installed in a mainframe I/O cage. The OSA supports Ethernet, Token Ring and FDDI connectivity. The maximum data rate is 10 Gbps.{{cite book|title=Local Area Network Concepts and Products: Adapters, Hubs and ATM|url=https://www.ardent-tool.com/docs/pdf/SG24-4754-00_LAN_Concepts_and_Products_Adapters_Hubs_and_ATM.pdf|publisher=IBM Technical Support Organization|date=May 1996|edition=First}}{{cite book|title=Open Systems Adapter-Express - Customer's Guide and Reference|url=https://publibz.boulder.ibm.com/epubs/pdf/ioaexp03.pdf|publisher=IBM|date=November 2000}}{{cite web|url=https://www.ibm.com/docs/en/zos-basic-skills?topic=channels-open-systems-adapter-osa|title=Networking on z/OS - Open Systems Adapter (OSA)|publisher=IBM}}