给定一段文字，提取其中的关键词。
"Artificial intelligence (AI) is the simulation of human intelligence processes by computer systems. These processes include learning (the acquisition of information and rules for using the information), reasoning (using rules to reach approximate or definite conclusions) and self-correction."
Artificial intelligence, simulation, human intelligence processes, computer systems, learning, acquisition of information, rules, reasoning, approximate conclusions, definite conclusions, self-correction.