The MUDlib is a set of source code, which is interpreted by the Core Driver.
It provides building blocks for the World code, and includes, but is not
limited to the following systems:

a) Communication systems
b) Object handling systems
c) Combat systems
d) Guilds, skills and spells

\o/

well when guilds, skills and spells are mentioned are mentioned in context
with the MUDlib they talk about the (generic) guild object(s)/system and
generic spells/skills. This has (to my understanding) nothing to do with a
specific guild, which is instead content and belongs to world code.
To further clarify the subject (at least as far as I understand it): The
"guild system" in abstract and implemented form is part of the MUDlib. It's
there to help a world content coder implement a specific guild (which is part
of the world code).

actually, after reading the helpfile again, I come to the conclusion that even
concrete guild implementations are considered part of the MUDlib .... so
hmm.. forget about my previous post. (altho it was placed in "bs" correctly