harrymcc writes: On October 18th 1985, Nintendo launched its NES console in the US, reviving a near-dead video game industry and establishing Nintendo as a leader in home consoles. We've celebrated with a roundup of some of the stranger spinoffs that NES has inspired over the last quarter century, from odd controllers to a lock parents could use to disable the console to do-it-yourself projects like an NES built into a Super Mario cartridge.
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals