The Open Source Initiative (OSI) is a non-profit corporation formed to educate about and advocate for the benefits of open source and to build bridges among different constituencies in the open-source community.
The Open Systems Interconnection (OSI) reference model, developed by the International Organization for Standardization (ISO) in 1977, is a conceptual framework that can be used to get a better understanding of the complex interactions taking place among the various devices in a network. The purpose of the OSI model is to demonstrate how the network entities should work together for communication.
英文中的“free”除了代表自由以外，還有著「免費」的意思，因此造成許多人對於自由軟體的誤解，以為自由軟體是一種完全免費的軟體。其實自由軟體並不一定是免費的，只不過與專屬軟體相較起來，自由軟體所收取的費用顯然低了許多，而之所以如此，是因為自由軟體在散布的過程中並不收取授權金。不過不收取授權金，並不代表著不可以收取其他費用，除了授權金以外，可以為了支付複製成本或者提供額外的擔保服務而收取費用。不過若是不收取授權金、也严8
OpenVPN is a fully-featured SSL VPN system. Supporting site to site VPN; remote acess, WIFI security, and other goodies. Open VPN uses OSI layer 2 or 3 with standard SSL/TLS protocol.
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