"fork()" is one of the greatest APIs (in other words "paradigm") that were designed and built at Berkeley in the 1970's.

I hope that I am a first person in the world

who tried to use the API for "time leap" between two different "world line"

in paralell virtual worlds in my PC.

(As far as I know, nobody has used this API like the above case)

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Refer to

"See this code, if you want to realize "time leap" or "reading steiner" in your computer"

Additions: Okabe's "reading steiner" functions are omitted, because information of his memory will be send by pipe() or external files.