Introduction to Food Science & Systems Science is one in a series of Just the Facts (JTF) textbooks created by the National Agricultural Institute. This is a bold, new approach to textbooks. This textbook presents the essential knowledge in an open easy to use and read format. The knowledge in each the 25 units is identified by a major concept, objectives, key terms, concise topical information, exercises/activities, unit self-reviews, and QR codes for downloadable unit presentations.