> For the complete documentation index, see [llms.txt](https://docs.vioso.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vioso.com/preparation/deployment/licensing.md).

# Licensing

VIOSO uses a PC-locked licensing. A PC-locked license means, that an activation key can be used on 1 pc at the same time only. Purchased licenses are permanent and valid for the software version at the time of purchase. With software maintenance, licenses can be made valid for future versions. Learn more about software maintenance here: [Maintenance](/preparation/deployment/licensing/maintenance.md)

A licence comes in form of an acitvation key (XXXX-XXXX-XXXX… or XXXXXXXX). The activation key represents a license by this data:

| Channels           | Defines the number of projectors that can be calibrated at once |
| ------------------ | --------------------------------------------------------------- |
| Maintenance period | Defines the time span where all updates can be installed & used |

### License activation <a href="#id-339636151-dajlbk" id="id-339636151-dajlbk"></a>

To execute the software, it’s license must be activated once on a PC.

* Learn here about Online Activation (PC is connected to the internet – recommended): [License Activation](/preparation/deployment/licensing/license-activation.md#online-activation)
* Learn here about Offline Activation, using a secondary device (Laptop, mobile phone, etc): [License Activation](/preparation/deployment/licensing/license-activation.md#offline-activation)

### License transfer <a href="#id-1564789225-51bhxr" id="id-1564789225-51bhxr"></a>

PC-locked licenses can be transferred to another PC. This works online and offline. Learn here about how to transfer from one PC to another one: [License Transfer](/preparation/deployment/licensing/license-transfer.md)

### License Check <a href="#id-1620697903-t9vp0t" id="id-1620697903-t9vp0t"></a>

You can check the state of your license either directly in the application, or online.

* Learn here how to access the License Wizard after activation: [License information](/preparation/deployment/licensing/license-information.md#id-1950697446-kz3bi5)
* Learn here how to retrieve License Information from our Licensing Server using your activation key: [License information](/preparation/deployment/licensing/license-information.md#id-810337432-ixcqda)

### Demo <a href="#id-708291944-uewthw" id="id-708291944-uewthw"></a>

VIOSO can be run as demo. Learn here more about how to retrieve a demo license: [Demo License](/preparation/deployment/licensing/demo-license.md)