The HP 11C is a programmable scientific calculator. It has all the required scientific functions such as trigonometric functions (including the parabolic variants). Also present are statistical functions (including a random number function). Its advanced functions include labels, including 5 labels (A to E) which can be executed directly from the keyboard (one-stroke if the calculator is put in "User" mode). Other important advanced functions are loops, comparisons and indirect addressing. Programs and data are stored in constant memory and are not lost when the calculator is switched off. This calculator is one of HEWLETT PACKARD’s landscape series of calculators, named the HP Voyager series. The HP-11C is renowned for its extreme energy efficiency, with batteries that typically last between 5 and 15 years, and in many cases even longer. The calculator is in very good condition with a few user traces. The calculator will be packed carefully.