javaxman writes "Next spring, the U.S. military is expecting to deploy Talon robots with machine guns. They can also be equiped with rocket launchers. Really, they're remote-controlled 'bots, not true autonomous 'bots, so you can save the Skynet jokes for, um, some day in the not-to-distant future. This is just the first, or maybe second step. As for me, I just want to see arena matches between gangs of these suckers. Robot wars indeed!"
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals