请教高手 怎么分析这句话的语法？

PimmsL.D.N.

Having originated in technology developed in the early 1960s, it evolved through a miracle of international co-operation into the system we know today.

having originated in technology 是主语么？it  ...
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having originated ...... 是分词形式，与in technology developed in the early 1960s一起在整句句子里做壮语用； it 是句子的主语， 指的是后面提到的那个system，句子的谓语是evolve。