When choosing a Computer Algebra System (CAS), Maple is recommended for its open algorithm access, while Mathematica's algorithms are proprietary. For basic calculus, a scientific calculator suffices, but if exploring CAS more broadly, consider open-source options like Octave and Scilab, which are better suited for numerical tasks and linear algebra. Both Octave and Scilab support graphing, with Scilab offering superior real-time visualization features. Overall, the discussion emphasizes the importance of understanding numerical calculations over relying solely on CAS for learning.