000-499
500-999
0

000-100

Computers & General information

Mr. Brown who likes to solve mysteries in books... what was his name again? Britannica, Wikipedia... something like that. 

0

500s

Science

My Very Exciting Magic Jeep Slid Under Norway.

This helps me keep the eight straight!

100

100s

Philosophy & psychology

If you walk past a graveyard and whistle, you might attract some of these. 

100

600s

Technology & Applied sciences

Black Beauty went out one Misty morning and saw a Biscuit in the Sea! It was the Spirit of a Pegasus mixed with a Dash of Rainbow.

200

200s

Religion

Percy Jackson and his friends made this topic very popular among readers! 

200

700s

Arts 

Authors like Jim Davis, Dav Pilkey, Bill Watterson, Raina Telgemeier, and Lincoln Pierce might have checked out a book like this when they were young.

300

300s

Social sciences

This recipe for cold weather is good with a carrot or two some meat, many people like cabbage in it, but you definitely need an igneous, sedimentary, or metamorphic ingredient.

300

800s

Literature

When the sidewalk ended, I fell up and noticed a light in the attic.

400

400s

Language

I speak volumes without ever making a sound.

400

900

History & Geography

We're off to the home of the north pole! Maybe we'll see some elves...