Ponderosa Computing

Reliability - Clarity - Accuracy

  • Excel XLL Add-ins
    • Statistical Distributions
    • Linear Algebra
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  • About Me

Ponderosa Computing

My name is Paul McClellan. From 1976 to 2010 I developed modeling, computational, and imaging software in the instrument, computing, robotic, display, and printing industries.

Since 2010 I have been an independent software developer, focused on developing Microsoft Excel XLL Add-Ins that extend the computational capabilities of Microsoft Excel on the Microsoft Windows Platform. Here I describe and share these Add-Ins. I hope you find them of use.

My Computational Software Development Principles

I develop my software using these development principles:

  • Reliability – I use peer-reviewed open source and public domain computational libraries with documented algorithms and error estimates.
  • Clarity – I define the computational interfaces over logical and consistent domains providing clarity in the use of the product.
  • Accuracy – I strive to make the computations as accurate as possible across all suitable inputs.

Contact Me

I welcome corrections, suggestions, and inquiries. You may contact me at <paul at ponderosacomputing dot com> .

Site content copyright © 2025 Paul J. McClellan. All rights reserved.
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