BirdDoggy writes: TG Daily has an article about a pneumatic engine developed by the French company, Moteur Developpment International (MDI). With three carbon fiber air cylinders mounted under the vehicle, the prototype is capable of speeds up to 68mph and can travel about 124 miles between recharges. The recharges can be done in 4 hours with just $2 worth of electricity.
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals