Here are a few off the top of my head, as a mathematician-turned-programmer who never has been an algebraic geometer.

- Elliptic curve cryptography (https://en.wikipedia.org/wiki/Elliptic-curve_cryptography)

- Grobner bases, with many applications. Example domains: coding theory, robotics, signal processing... (https://math.stackexchange.com/questions/32421/applications-...)

- Physics [solitons] (https://kasmana.people.cofc.edu/SOLITONPICS/)

- Physics [string theory] (https://royalsociety.org/~/media/people/new-fellows-2014/Pre...)

- Automata theory, via "tropical" algebraic geometry (https://link.springer.com/article/10.1007/s00233-019-09999-8)

This is not even considering applications of AG to other areas of pure mathematics, which are extensive.

Besides the other list, places results from AG have uses in tech include statistics, control theory, robotics, error-correcting codes, phylogenetics, geometric modelling, string theory, game theory, graph matchings, solitons , integer programming, computer vision, computer aided design.....

Some of these are likely why Blinn decided to make an entire course on using it just in computer graphics alone.