These are some notes from Doug McIlroy's guest lecture.
I added some links, starting with SB: 

---------------[ Laziness ]---------------

I forgot to say that the power-series story
can be found on line at
http://www.cs.dartmouth.edu/~doug/powser.html

This example needed more mechanism than I
had described:
    cosx = 1 - integral sinx
    sinx = integral cosx

The web page tells how to make it work.
But using only the info at hand it should have
been written thus:
    cosx = series 1 - integral sinx
    sinx = integral cosx

---------------[ Prelude ]---------------

The Prelude function---filter, repeat, iterate, foldl, foldr,
etc.---really color the way one codes in Haskell. Most are trivial,
but essential.  Sadly, GHC doesn't make the Prelude easily visible.

It comes with Hugs and can be fetched. 

SB: I posted a copy in hs/Hugs-Prelude.hs

It not only lists the functions, it gives the 
code--very handy help in learning the language!

------------------------------------------

SB: You can look at the GHC prelude in
https://github.com/ghc/ghc/blob/master/libraries/base/Prelude.hs

It is larger that Hugs' and is split into a series
of files (some of these we've already seen, such
as Data.List, Data.Maybe, GHC.Prim, etc.