Dr. Eric Brill is a computer scientist specializing in Natural Language Processing. A computer scientist is a person that has acquired knowledge of Computer science, the study of the theoretical foundations of information and computation and their application Natural language processing ( NLP) is a subfield of Artificial intelligence and Computational linguistics. He is famous for his Brill Tagger, a supervised part of speech tagger. The Brill tagger is a method for doing Part-of-speech tagging. Part-of-speech tagging ( POS tagging or POST) also called grammatical tagging or word-category disambiguation, is the process of marking up the