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+# HP35s programs
+
+## Description
+
+Programs to add funcionality to the HP35s calculator
+
+## Contents
+
+*****S** - Save (S001) and restore (S011) the stack in/from (J) 10-13.
+
+**Q** - Solve quadratic equation, it takes a, b and c from the stack and it
+doesn't use any variables.
+
+**P** - Cross product between two vectors, it takes the vectors from the stack.
+It uses (J) 105-110 and (I) 100-102