# Glossary¶

A partial glossary of terms used in this guide. For more complete descriptions of the components in JupyterHub, see the list of tools used in JupyterHub. Here we try to keep the definition as succinct and relevant as possible, and provide links to learn more details.

A set of named values that can affect the way running processes will behave on a computer. Some common examples are PATH, HOME, and EDITOR.