Sam Walton founded Walmart and Sam's Club.
Prior to the summer of 1990, Walmart had no presence on the West Coast or in the Northeast (except for a single Sam's Club in New Jersey which opened in November 1989), but in July and October that year, it opened its first stores in California and Pennsylvania, respectively
 Sam's Club opened in New Jersey in November 1989, and the first California outlet opened in Lancaster, in July 1990

