In my case all links were broken. Found them on the wayback machine https://web.archive.org/web/20181222104954/http://csillustra...

The ones that a missing are old and may have been moved around. I’ll see if I can find them or updated versions. Was there a specific one you were interested in? (Ping me on Twitter or @gmail if I forget to reply here.)

All of the ones that I clicked on seem to be missing.

http://csillustrated.berkeley.edu/illustrations.php

The first three illustrations on the page are all 404 links. If someone is maintaining this site, it's crucial for every link on a page like this to work.

Some are accessible. Can find the accessible ones here:

http://csillustrated.berkeley.edu/PDFs/handouts/

I'm getting 404 on the links

http://csillustrated.berkeley.edu/PDFs/ :)

If you go to the posters section I found they work there