Typically a craft, or skill or some sort of workmanship that isn't widely practiced anymore. Such a fate is often caused by modern methods that make such a manual craft unnecessary. But some people still carry these skills, and their work is favorable.

Some examples include:

• Glass Blowing
• Iron Working
• Wood Carving
• Chip Tunes (see Tracking)

And Many more....

Feel free to list your lost arts here.