I'm not sure that using a calculator for statistics is necessarily easier than a book of tables, because statistical functions typically require processing more than one number at once. On a calculator that results in having to navigate menus, or entering a one-line program, not much better than using R, for example. For these reasons calculators can't speed things up in the same way as they did over the use of log and trig tables, or slide rules for that matter. Possibly a calculator designed especially for statisticians could speed things up. But I would hang on your statistical tables for now. I myself favour those by Henry Neave (an Open University set boook once), Lindley and Scott (often issued to examination candidates) or F.C. Powell (recommended by a lecturer as comprehensive), and no doubt people might have own favourites. By all means tell us, and why!