A recommended resource for modeling with differential equations is J.D. Murray's "Mathematical Biology," although it focuses on biological systems. For engineering applications, particularly in mechanical and materials engineering, Hairer and Wanner's books on differential algebraic equations (DAEs) are suggested, along with examples available on Hairer's website. Modeling is crucial in various engineering fields, including solid mechanics, heat transfer, and fluid mechanics, as it applies physical principles to describe system behaviors mathematically. The discussion highlights the importance of solving ODEs and PDEs to predict physical system behavior. Additionally, software like Mathematica and Maple is mentioned as valuable tools for modeling, despite their cost.