# Backends

Each backend has an application class, and a model application class for an app with a
model. `composeui.core.application.run` starts the classes of the backend that the
command line selects.

## Qt

```{eval-rst}
.. automodule:: composeui.qtcore.qtapplication
```

## Textual

```{eval-rst}
.. automodule:: composeui.textualcore.textualapplication
```

## Web

```{eval-rst}
.. automodule:: composeui.webcore.webapplication
```