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Merge pull request !14046 from Annie_wang/PR13214
# Distributed Hardware
## Introduction
### **Distributed Hardware Subsystem**
The distributed hardware subsystem manages hardware information of all the devices in a Super Device so that the hardware capabilities can be shared and called across devices.
### Architecture
![Distributed Hardware Subsystem](figures/distributed-hardware-subsystem.png)
## Directory Structure
```
foundation/distributedhardware
├──device_manager # Directory of DeviceManager.
├──distributed_hardware_fwk # Directory of the distributed hardware framework.
├──distributed_camera # Directory of the distributed camera component.
└──distributed_screen # Directory of the distributed screen component.
```
## Component Description
### DeviceManager
DeviceManager provides authentication and networking for devices of a Super Device, including discovering distributed devices, performing authentication, and listening for device online/offline status.
### Distributed Hardware Framework
As an information management component of the distributed hardware subsystem, the distributed hardware framework implements unified hardware access, information query, and hardware enablement.
### Distributed Camera
The distributed camera component implements collaboration of cameras of multiple devices that form a Super Device. Instead of directly interacting with applications, the distributed camera component only provides C++ interfaces for the distributed hardware framework. Applications can call the APIs of the camera framework to use the distributed camera component to operate cameras of other devices, just like operating a local camera.
### Distributed Screen
The distributed screen provides a screen virtualization capability, which allows the screen of another authenticated device to be used as a display. In the distributed hardware subsystem, the distributed screen component implements system projection, screen mirroring, and screen splitting across the devices that form a Super Device.
## Repositories Involved
[distributedhardware\_device\_manager](https://gitee.com/openharmony/distributedhardware_device_manager)
[distributedhardware\_distributed\_hardware\_fwk](https://gitee.com/openharmony/distributedhardware_distributed_hardware_fwk)
[distributedhardware\_distributed\_camera](https://gitee.com/openharmony/distributedhardware_distributed_camera)
[distributedhardware\_distributed\_screen](https://gitee.com/openharmony/distributedhardware_distributed_screen)
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