This is a user manual for HP 40gs graphing calculator.
This manual covers all aspects of the HP 40gs graphing calculator, from basic on/off and menu navigation to advanced Computer Algebra System (CAS) functions, aplet customization, and programming. It includes detailed sections on each aplet type (Function, Parametric, Polar, Sequence, Solve, Linear Solver, Triangle Solver, Statistics, Inference, Finance Solver) and provides reference information for variables, memory management, and troubleshooting.
The guide also explains how to register the product, reset the device, and access built‑in help resources. Appendices contain a glossary, regulatory notices, and an index for quick reference.
Use the Reset command described in the manual under section R‑1.
You can register the product at www.register.hp.com.