More than 250 built-in functions, and function programming. Highlights include two-variable statistics and forecasting. Quickly find solutions using the menus, prompts and messages. Review data stored in list format, scrolling and editing as your data changes. Stay organized with the built-in clock and calendar with alarms. Power Source(s): Battery; Display Notation: Alphanumeric; Number of Display Digits: N/A; Display Characters x Display Lines: 22 x 2.