From the Las Vegas Sun story:
Over the past six months, the university's special collections department has archived thousands of documents as well as hundreds of company tokens such as glassware, poker chips, cards, promotional posters and even boxing gloves.

Hmm, wonder if they have any of those $3 chips Harrah's used for one day on one table?

Seriously, if you visit any US casino, you are observing Bill Harrah's legacy. While Harrah's didn't invent all of modern casino practices, they developed and institutionalised almost everything that happens in a casino, from finacing hotel towers to the way the blackjack dealers hold a deck of cards.