ESBCalc Pro is an Enhanced Windows Scientific Calculator with Infix Processing Exponential Notation Brackets Scientific Functions Memory Optional Paper Trail Printing Result History List Integrated Help and more. Functions include Trigonometric Hyperbolic Logarithmic - base 10 base 2 Natural - Random Number and many more. Also includes heaps of built-in as well as user-defined constants Hexadecimal Conversions and Fraction Conversions. Also allows for Floating Decimal Point optionally start at last position and other improvements to the User Interface. The calculator can have Prefix Functions turned on so that when calculating log (25) you can enter log 25 rather than the traditional 25 log. The Calculator also has an expression editor that allows the data that has been entered can be then edited and recalculated. Plus you have a dialog that supplies descriptive statistics such as Mean (Average) Median Variance Standard Deviation Skew and Kurtosis. Plus it can now also calculate the time between two dates and/or times. Precedence can be turned off for those who do not wish it. Optimized for Windows XP/Vista/7 in 800x600 (or better). Registered version also includes Electronic Documentation and PDF designed to produce Printed Documentation. A Portable Version is also available to Registered Users that easily allows the Calculator to be used on Removable/Portable Drives. Register only once for the life of the product. Also available as part of the ESBCalc Pro Suite which includes ESBUnitConv Pro ESBFinCalc Pro and ESBProgCalc Pro