HP 12CP Financial Calculator High Quality and Durable F2231AA#ABA , # 2073274 Portable Design Energy Star Certified Robust and versatile financial calculator Over 120 built-in functions for business, finance, mathematics, and statistics, including date calculations Efficient data entry using RPN Small size; easy to take anywhere Long battery life Robust and versatile financial calculator Over 120 built-in functions for business, finance, mathematics, and statistics, including date calculations Efficient data entry using RPN Small size; easy to take anywhere Long battery life