Believe it or not I first used Mathematica for plotting results found with APL. I suppose I rather distrusted someone else’s methods for evaluation of functions.

After a while I found that Mathematica got the same results as my APL functions—and much more easily—so I turned over in total to Mathematica.

…I have used Mathematica in electrical engineering problems, though none of them were very large—did I really find the eigenvalues of an 8000 square symmetric real matrix on my Mac? I think so.

I also use Mathematica to check numerical exam questions; the document that results, explaining the steps, is useful and the numbers reliable. I even got an external examiner to accept the output….

I am very glad for the existence of Mathematica.