Keywords: user_guide

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# 1 Introduction

This guide covers the usage of the `PWscf` (Plane-Wave Self-Consistent Field) package, a core component of the QUANTUM ESPRESSO distribution. Further documentation, beyond what is provided in this guide, can be found in the directory `PW/Doc/` (note: all directories are relative to the installation directory), containing a copy of this guide.

Important notice: due to the lack of time and of manpower, this manual is only partially updated and may contain outdated information.

This guide assumes that you know the physics that `PWscf` describes and the methods it implements. It also assumes that you have already installed, or know how to install, QUANTUM ESPRESSO. If not, please read the general User's Guide for QUANTUM ESPRESSO, found in directory `Doc/`; or consult the web site:
`http://www.quantum-espresso.org`.

People who want to modify or contribute to `PWscf` should read the Developer Manual: `Doc/developer_man.pdf`.

Subsections

- 1.1 What can `PWscf` do
- 1.2 People
- 1.3 Terms of use