Common Lisp Quick Reference
clqr.berlios.de
clqr.berlios.de
One namespace for the built-in functions is not a problem in practice, it just means that you don't have a de facto categorization of the commands like in Python. This sometimes makes life painful when looking for commands, but no big deal.
I sure wish the hyperspec was better hyperlinked though. The See Also section is abysmal. find is not connected to member: What the hell.
I also find that C-c-d-a in slime is helpful for looking for the right command.
It's not as bad as it sounds, when you consider that that includes not only (the names of) functions and macros, (of which there are many groups of similar/related ones, e.g. car, cdr, cadr, cdar etc. or char<, char>, char= etc.,) but also system constants and variables, and types and classes.
You can consult http://www.lisp.org/HyperSpec/FrontMatter/Chapter-Index.html when you need deeper knowledge in a particular topic.