eli5: Why do slot machines have „[BAR] as a symbol?

bar bar slotBar Bar Black Sheep is an on video slot game developed by Games Global. This farm-themed slot has 15 betways and a x999 max win. Features include free spins and win multipliers.What does the BAR symbol mean on a slot machine? The BAR symbol orinated from the Bell-Fruit Gum Company, which used the logo to represent their brand on