>> Klunder’s innovation meant that instead of having to recalculate (recalc) every cell every time a cell changed, Odyssey only recalculated the affected cells.

>> Klunder’s innovation meant that instead of having to recalculate (recalc) every cell every time a cell changed, Odyssey only recalculated the affected cells. I don't believe programmers were that bad in 1985 to recalculate entire sheet if one number changed. We had LISP and Prolog and a lot of other smart stuff by that time.