According to John McCarthy, a researcher from Stanford, AI is a science and a technique of developing intellectual devices and especially computer programs. AI is connected with a similar task of using computers for understanding human intellect, but AI should not be limited by biological methods.
Speaking in a simpler way, AI’s task is to upgrade programs with giving a capability of imitating human behavior.
Engineering knowledge is an important part of AI researching. Devices and programs must have enough data about the world to act and react as humans.
AI must have an access to features, categories, objects and their relations to realize engineering knowledge of AI. AI stimulates common sense, problems solving, capability to analytical reasoning and thinking of devices which is a complicated and exhausting job.