Engineering
    Topanga SchematicMaker
Use this software tool to easily create electrical and electronic schematics, PLC ladder, flow and timing diagrams.
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Financial
       Topanga Annuity
Calculate the present and future value of a series of payments made at regular intervals.
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       Topanga APRAPY
Convert between APR (annual percentage rate) and APY (annual percentage yield)
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       Topanga Depreciation
Calculate a depreciation schedule using straight line, constant ratio or sum of the digits. Generate and export reports.
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       Topanga Loan
Calculate a loan amortization schedule using compound interest. Generate and export reports.
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       Topanga Mortgage
Calculate a mortgage loan amortization schedule using compound interest. Compare loans with and without points. Generate and export reports.
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Graphics
       Topanga ImageBorder
Add a colored border to any image to create an image exactly sized for standard frames. Create a composite image sized for a standard frame composed of 1 by 2, 2 by 1 or 2 by 2 images.
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Mathematics
       Topanga FirstOrderDEQ
Calculate the Runge-Kutta numerical solution for a first order differential equation with specified initial condition.
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       Topanga SecondOrderDEQ
Calculate the Runge-Kutta-Nystrom numerical solution for a second order differential equation with specified initial conditions.
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