Getting started

This section takes a new user from installation to one complete calculation, then explains the two supported frontends and the artifacts they produce.

Recommended reading order

Page	Purpose
Installation	Install Quantas, optional plotting support, and documentation tools.
Your first calculation	Run the same small Elasticity calculation from the CLI and Python API.
Python API	Understand public namespaces, typed results, observers, persistence, discovery, and EOS’s different lifecycle.
Command-line interface	Learn command organization, shared controls, terminal behavior, and error conventions.
Results, reports, and plots	Distinguish native HDF5, reports, exports, terminal output, and plots.

After these pages, continue with Scientific background, Implementation and workflows, or Tutorials according to whether you need theory, implementation choices, or a complete worked example.