Library of Congress porn classification

[snopes]

Comment: Brad Meltzer's novel "The Inner Circle" suggests that the Library
of Congress has an unofficial catalog category for "X-rated" books deemed
to be pornographic or prurient. He states that is why W, X, and Y are not
part of the LC catalogue system (I and O are also absent).

He states that those wishing those books (or movies) must ask at the desk
and they are delivered from behind the desk. This seems poppycock to me.
Looking at the term "X-rated" on line, it is said the term wasn't used
until 1970, far later than the Library of Congress system was 'invented'.

[Not_Done_Living]

Thats just what the illluminato want you to think...

[Jay Temple]

Not commenting on W-Y, but a more likely explanation for I and O is to avoid them being misread or mistyped as 1 and 0. (I know the same is true of VIN's.)

[Sjö]

I guess the Y-rated books give the real reasons behind government decisions.