Ideas for programming naming systems

For when I'm looking for ways to categorize or name things related to code/programming/css:

Police/Fire radio codes

https://web.stanford.edu/~reneeb/bill/n.radio.code.html

Greek mythology names: Lots of stuff here:

http://en.wikipedia.org/wiki/List_of_Greek_mythological_figures

Geologic time scale

https://en.wikipedia.org/wiki/Geologic_time_scale#Terminology