 In 2005, Google claimed that promising results were obtained using a proprietary statistical machine translation engine.The statistical translation engine used in the Google language tools for Arabic  English and Chinese  English had an overall score of 0.4281 over the runner-up IBM's BLEU-4 score of 0.3954 (Summer 2006) in tests conducted by the National Institute for Standards and Technology.With the recent focus on terrorism, the military sources in the United States have been investing significant amounts of money in natural language engineering.