An 8.5-inch LCD panel can be used in a variety of applications, including:

1. Tablet computers: As a display screen for Android or Windows-based tablets.

2. Industrial control systems: For displaying information, monitoring processes, and controlling machinery.

3. Medical devices: For medical imaging, patient monitoring, and diagnostic equipment.

4. Digital signage: For displaying information, advertisements, and messages in public spaces.

5. Raspberry Pi and DIY projects: As a display screen for hobbyist projects, such as retro game consoles, home automation systems, and more.

6. Automotive systems: For in-car entertainment, navigation, and information systems.

7. Point-of-sale (POS) systems: For displaying product information, prices, and transactions.

8. Education and training: For interactive whiteboards, e-learning platforms, and digital classrooms.

9. Home automation: For controlling and monitoring smart home devices.

10. Gaming consoles: For building custom handheld game consoles.

These are just a few examples of the many uses of an 8.5-inch LCD panel. The specific application will depend on the panel's resolution, touch capabilities, and other features.