A small area of knowledge, because we can offer comment and to exchange knowledge or ask questions, in matters so that other people who are interested or have any questions, help each other answer.
A small area of knowledge we can offer comments and ask questions or share their knowledge on various subjects. So people do not have the answers or help answer.
Area of knowledge enterprises, because we can offer and comments can exchange ความรู้หรือ questions on various matters. For other persons interested or have the answer to answer.