# The hardware operators

The hardware operators are operators that you install on a `liken`
cluster. Each one publishes one kind of machine hardware as DRA
devices, so a workload claims that hardware the way
[Give a workload a device](/docs/guides/devices/) shows, with no
privilege and no host path.

Each operator is a DRA driver of its own, separate from the
operating system's driver that [Devices](/docs/reference/devices/)
describes. The operating system publishes the hardware a machine
holds, such as a Bluetooth radio, a GPU, or a sound card. A hardware
operator publishes what that hardware serves, at the grain a
workload asks for: a paired controller, a monitor output, an audio
output.

The name of an operator's device class is also the hostname of its
manual. Each manual gives the install steps and the claims for its
devices:

* [bluetooth.liken.sh](https://bluetooth.liken.sh) publishes paired
  Bluetooth controllers. The source is
  [liken-sh/bluetooth-operator](https://github.com/liken-sh/bluetooth-operator).
* [display.liken.sh](https://display.liken.sh) publishes monitor
  outputs. The source is
  [liken-sh/display-operator](https://github.com/liken-sh/display-operator).
* [audio.liken.sh](https://audio.liken.sh) publishes audio outputs.
  The source is
  [liken-sh/audio-operator](https://github.com/liken-sh/audio-operator).