Royalties can be earned from allowing others the right to use:

http://www.investopedia.com/terms/r/royalty.asp

Royalties can be earned from allowing others the right to use various forms of intellectual property, such as:

1. Music: Musicians and composers earn royalties when their songs are played on the radio, streamed on platforms like Spotify, sold as digital downloads, or used in movies, TV shows, or commercials.

2. Books: Authors earn royalties from the sales of their books, whether in physical or digital format. These sales may include printed copies, e-books, or audiobooks.

3. Artwork: Artists can earn royalties when their artwork is reproduced, such as through prints, posters, or licensing for use in products like calendars or clothing.

4. Patented Inventions: Inventors earn royalties when others use or manufacture their patented inventions. This can include products, processes, or technologies.

5. Trademarks: Trademark owners may earn royalties by granting others the right to use their trademarks on products or services.

To determine the exact amount of royalties earned, various factors come into play, such as the terms of the licensing agreement, the popularity or demand for the intellectual property, and the revenue generated by its usage.