Calculon is a combination of a unit/currency converter and standard calculator with 12 digits precision, trigonometric, exponential, logarithmic, date and temperature operations. The latest currency rates can be updated from the internet either wirelessly (Treo 600/650, LifeDrive, etc) or via your desktop's connection with the provided conduit. Calculon is optimized for one-handed operation on the Treo phones! Up to 15 conversion categories can be defined with 200 items in each. Any category can also serve as a group of constants. Easily convert between Celcius and Fahrenheit, miles and kilometers, gallons and litres, kilograms and pounds, and much more. Features: • 15 user definable unit (and/or constant categories) • All units of the same category can be recalculated at the same time • Temperature conversions between F (Fahrenheit), C (Celsius) and K (Kelvin) degrees • Angle formats conversion from HMS (hours, minutes, and seconds) to decimal • Julian day to Gregorian calendar date conversion • Time->seconds and Seconds->time conversion • Support for the Euro and compatible with all the conversion rules Mathematical functions: • Standard: +, -, x, / • Trigonometry: sin, cos, tan, asin, acos, atan • Exponential/Logarithmic: x^2, y^x, 10^x, e^x, log, ln • Date: Date +/- number of days, number of days between two dates • Other functions: percentage calculation, area and circumference of a circle, constants Pi and Pi/2 Other features: • 12 digits math precision • Number of decimal places can be defined in the range from 0 to 11 and there is also "Float" (F) option for displaying all possible decimal digits (without ending zeros). • 10 user memories. You can perform arithmetic operations (+, -, x, /) with each memory • Copy/paste between display and clipboard • Each category names and values can be exported/imported to/from MemoPad memo. Fields are delimited with TAB character. That way, you can export to a MemoPad memo, edit them on your desktop computer, and after hotsync import them back into Calculon. • Date and time calculations • Multiple multiplication and division with the same number • "Constants" mode - current category serves as a group of constants. If you append "_C" to the category name, then Calculon will automatically enter constants mode each time you choose that category • Reversed unit conversions • Binary calculator (hexadecimal, decimal, octal and binary input modes)