The story
Steinberg's began as a grocery store founded in 1917 in Montreal by Jewish-Hungarian immigrant, Ida Steinberg. Her five sons, led by Sam Steinberg, grew the company from a tiny storefront on St. Lawrence Boulevard into the most popular and largest supermarket chain in Quebec. It was the first to create the "supermarket" concept in Quebec, in 1934, with expansions into Ontario (primarily the Ottawa area) and parts of New Brunswick.
From Wikipedia’s article on Steinberg's (supermarket), shared under CC BY-SA 4.0.4