Then the external protection mode (the patent mode) was introduced.In this part, the example was a series of prejudication of USA and the reaction of several nations toward the USA prejudication.

• 然后介绍的是以美国判例为代表的计算机程序专利保护模式（外来保护模式），这部分的重点是论述美国判例的演进过程及各国对于引入外来保护模式的对应措施。