Spam ,originally called spiced ham, was first introduced in 1937. The canned
precooked meat product is made by the Hormel Foods Corporation. Spam has
been the brunt of many jokes and urban legends which has made the product
part of pop culture, often called “mystery meat”. In 2007, the seven billionth
can of Spam was sold. 

1940s

 
  The Hormel Spam Museum in Austin, Minnesota.

1945

Sammy Davis, Jr.