It's so simple it is not documented clearly. That once had me stumped for half a day, too, until a shell scripter pointed out the obvious:
system "task1 &";
system "task2 &";
system "task3 &";

[download]
Doing something sensible with the forked off STDOUTs is left as exercise. (Hehe, I always wanted to use that expression.)

In reply to Re: launching concurrent processes by Anonymous Monk
in thread launching concurrent processes by Anonymous Monk

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