Modules
Library modules
The module picker changes the Solid State Software library loaded into the emulator. That affects the cue card, the available programs, and the labels shown on screen.
Keep the selected module aligned with the file you are loading. If a state file includes a SOLID-STATE-MODULE: line, the emulator can switch to that module automatically.
If the cue card or program list looks unexpected, the module selection is the first thing to check.
Master Library
Applied Statistics
Investment
Surveying
Marine Navigation
Aviation
Leisure Library
Securities Analysis
Business Decisions
Math/Utilities
EE Library
Structural Engineering
Agriculture
RPN Simulator
Per-module details
Each module has its own cue card content and program selection. The app loads the matching ROM/library data together with the module metadata so the on-screen card stays in sync with the selected library.
This is an emulator feature, not a historical TI-59 walkthrough: the purpose is to make the active module understandable while you use the app.