The slides for the whole set of 4 lectures, in .pdf form, can be found here (167 slides, one per page),
or in smaller form here (two slides per page, 84 pages).

These lectures were given June 14, 15, 16, 17 at the ICTP in Miramare, Trieste, Italy by Steve Martin. They have been corrected since they were originally given. The most recent correction was made on June 22, 2005. Please do let me know if you spot any remaining errors!

The web page for the ICTP Summer School on Particle Physics 2005 is here.