Most of these are substantially above average.

Dewey Decimal is a good way to organize books, because books that are used together tend to be near each other. I don’t apply stickers, but instead indicate the shelf locations with little blocks. Right-click on a picture for full resolution.

A few computer books, some Latin books, then mathematics.

Physics and other sciences, technology.

Electronics, then some literature and poetry. Most of literature is not on these shelves.