Accuracy, functionality, and dependability make this pocket-sized calculator a great tool for engineers, surveyors, college students, scientists, and medical professionals. Features include 31KB of memory, RPN and algebraic data-entry (no competitor has both of these!), a powerful two-line display, and the time-saving HP Solve application.<br><br>- Efficiently express calculation sequences without parentheses—reducing the number of keystrokes—using RPN<br>- Write and solve equations for any variable without rewriting the original equation (you can edit, undo, and delete) using the HP Solve application<br>- Program using the 31KB RAM user memory<br>- Get accurate calculation results with the 21-digit internal precision<br>- Adjust the contrast on the powerful two-line display<br>- Easily carry and hold; it's a handy size and has comfortable rubber side grips This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-025-3630, indicating validated use in U.S. government and defense logistics supply chains.