UPN-Calc is a RPN (Reverse Polish Notation) calculator for mobile phones.
· Arbitrary precision unnormalized BCD arithmetic.
· Arithmetic standard functions (approximated to arbitrary precision): sin, cos, tan, arcsin, arccos, arctan, 1/x, sqrt(x), exp(x), ln(x), y^x.
· Angle measure in DEG, RAD or GRAD.
· Stack contents and configuration information persistent between sessions.
· Open Source (GPL 2).

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