Abacus, now approved as an Office Update program forExcel 97 and 2000, is an equation-entry and editing tool with a highly customizable calculator-like interface that helps you get the most out of Excel fast! A large library of built-in andprogrammable function keys put the mathematical, scientific, and conversion functions and constants you need at your fingertips. Advanced timesaving features like `smart-parentheses,? keyboard shortcuts, ToolTips and `Drag-and-Drop? technology provide the convenience you expect from an efficient user-interface.