Complex sentence: Lonnie D. Bentley is a Professor and the Department Head of Computer and Information Technology at Purdue University and a co-author of the textbook "Systems Analysis and Design Methods", which is now in its 7th edition.
Split into simpler sentences: Lonnie D. Bentley is a Professor and the Department Head of Computer and Information Technology at Perdue University. He is also co-author of the textbook "Systems analysis and Design Methods", which is now in its 7th edition.