MATLAB

MATLAB is mostly used in engineering and science, so learn it alongside the numerical work you need. MathWorks' MATLAB Onramp is a short interactive introduction, and MATLAB Fundamentals gives broader coverage. Introduction to MATLAB for Engineering Students and A Beginner's Guide to Matlab are short written alternatives.

Physical Modeling in MATLAB by Allen B. Downey teaches programming through simulations, and Numerical Computing with MATLAB covers numerical methods in depth. MIT's Introduction to MATLAB Programming is a structured university course. Simulink users can start with Simulink Onramp and Simulink Fundamentals, and the MATLAB Basic Functions Reference Sheet is worth keeping nearby.