Transactions have traditionally been handled manually, between brokers or counterparties. However, starting in the 1970s, a greater portion of transactions have migrated to electronic trading platforms. These may include electronic communication networks, alternative trading systems,  dark pools  and others.
Lactic acid in Food. Lactic acid is naturally present in many foodstuffs. It is formed by natural fermentation in products such as cheese, yogurt, soy sauce, sourdough, meat products and pickled vegetables.
Lactic acid bacteria is why. Lactic acid fermentation is the process used in the dairy industry to make cheese, yogurt, and buttermilk. We also have lactic acid fermentation to thank for pepperoni, sourdough bread, and pickles. Thank you lactic acid bacteria.