How Was "7-Eleven" Named?

From Wikipedia:

7-Eleven is a chain of convenience stores started in 1927 as Tote'm (so called because customers "toted" away their purchases). In 1946, Tote'm became 7-Eleven to reflect the stores' new, extended hours — 7am until 11pm, seven days a week. (The store hours are now different around the world. For example, the 7-Eleven stores in the USA, Hong Kong, Canada, Norway, Denmark, Malaysia, Singapore and Australia operate 24 hours a day.)

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