Established in 1985, American River Software began with the development of a financial software program, The Mutual Fund Investor, which tracks and analyzes mutual funds, and maintains portfolio transactions. Interests have expanded over the years, and this site serves as a portal to access the results of those pursuits.

Downloadable PDF files for solutions to the textbooks below are available at each separate web page.

- Solutions to Calculus with Analytic Geometry, by Edwin J. Purcell
- Solutions to Elementary Number Theory, by David Burton
- Solutions to Introduction to Linear Algebra, by Gilbert Strang
- Solutions to Vector Calculus, by Jerrold E. Marsden & Anthony Tromba
- Solutions to Elementary Differential Equations by Boyce, DiPrima & Meade

Downloadable PDF files for solutions to the textbooks below are available at each separate web page.

- Solutions to Physics for Scientists and Engineers, by Serway and Beichner