I can not to choose combination of words in right form and tense to write about development (in meaning progress, evolution) of Information Technology.
So, I want to write consistently two things:
1) Information Technology started to evolve since 1960s. (I guess here should be used passive voice and other tense like being + V3)
2) Then in 1990s as the Internet appeared, IT began to evolve more rapidly. (unlike it was earlier)
P.S. Can I change "evolve" with "develop" ?