Here's a circuit board with resistors installed. They're used by hobbyists to make their own boards.

https://www.youtube.com/shorts/CznnpTiCZuk
However, even for hobbyists, surface mount versions are now common:

Here's a circuit board with resistors installed. They're used by hobbyists to make their own boards.

https://www.youtube.com/shorts/CznnpTiCZuk
However, even for hobbyists, surface mount versions are now common:
