"Evolutionary programming" was introduced by Lawrence J. Fogel in the US, while John Henry Holland called his method a "genetic algorithm". In Germany Ingo Rechenberg and Hans-Paul Schwefel introduced "evolution strategies". These areas developed separately for about 15 years. From the early nineties on they are unified as different representatives ("dialects") of one technology, called "evolutionary computing". Also in the early nineties, a fourth stream following the general ideas had emerged – "genetic programming". Since the 1990s, nature-inspired algorithms are becoming an increasingly significant part of the evolutionary computation.