Casio Scientific Calculator

You won't find a more capable nongraphical calculator than this 2-Line, 401 Function Scientific Calculator. It differentiates and integrates, performs complex number calculations, has 40 physical constants and unit conversions. Its statistical functions include standard normal distribution probabilities. It covers quadratic and cubic equations, regression, base numbers, matrices, and vectors. You enter and it displays expressions directly. When every minute counts, it speeds through calculations in seconds. 401 function scientific calculator is solar powered with battery back-up. Includes a slide-on protective hard case.