问答题 You have to cheat, choosing only the date for the personal computer, say (mid 1970s), or the Internet (ditto) to make it seem much more rapid.
Comparing its diffusion among private users is, you might say, unfair to the comput er, for that machine's main use is in businesses. On that measure, the best historical anal ogy is with electrification, and the spread of the electric dynamo into factories.