I wouldn't sail this ship if I were you
0012 Categorization systems
-0012.1 Those relating to books
–0012.11 By subject matter
—0012.111 Dewey decimal
—0012.112 Library of Congress, Colon, Harvard-Yenching or other commonly-used system
—0012.113 This library is too much of a special snowflake to use a classification system adopted by other libraries
–0012.12 By colour
–0012.13 By alphabetical or numerical order
—0012.131 Alphabetical order by author
—0012.132 Alphabetical order by title
—0012.133 By number of pages
—0012.134 Alphabetical order by some vague concept associated with the book
–0012.14 By where there is a space on the bookshelf that they can be shoved into
–0012.15 By where there is a space on a flat surface that they can be put
—0012.151 Those that utilise low or zero gravity to use flat surfaces in all directions
–0012.16 Terrifying vortices of utter book anarchy
-0012.2 Those relating to people
–0012.21 Categorization by personality
—0012.211 Those that are general enough that one may see oneself in all the categories
–0012.22 Categorization by physical characteristics
—0012.221 Those that miss out, order or suborder people in such a way as to advance a theory of which characteristics are best
—0012.222 Those involving internet comments sections
–0012.23 Categorization by point of origin
–0012.24 Categorization by primary occupation
—0012.241 Those that imply not having a job equals not being a proper person
–0012.25 Categorization by general societal role and/or age
—0012.251 Systems that categorise women into moms and not-moms
-0012.3 Those relating to objects
–0012.21 Categorization by size
–0012.211 Systems that involve lining things up by physical size
–0012.22 Categorization by colour
–0012.222 Systems that involve lining things up by colour
–0012.2221 Those that are basically things-lined-up-by-colour porn for people who like that kind of thing
–0012.23 Categorization by what they do
–0012.231 Drawers of thingies and whatnots
-0012.4 Those relating to abstract concepts
-0012.5 Those relating to everything
–0012.51 Categorization systems that include themselves
–0012.52 Those that do not
