The term **‘FSD’** can have several meanings depending on the context. Common definitions include:

- **Full Self-Driving** – a term often used by Tesla to describe its advanced driver assistance features aimed at enabling autonomous driving.
- **Functional Specification Document** – a detailed description of a software system’s behavior, requirements, and design.
- **Field Service Device** – a piece of equipment used by technicians for maintenance or diagnostics in the field.

If you meant something else, please specify the context.