给出一篇文章，并从中识别出最常用的词汇。


以下是文章的一部分：
Natural language processing (NLP) is a subfield of computer science, artificial intelligence, and linguistics concerned with the interactions between computers and human languages. It focuses on programming computers to process and analyze large amounts of natural language data.
文章中最常用的词汇为：natural、language、processing、computers、human、data。