The Dow Jones Industrial Average (or “the Dow”) is a stock index made up of 30 large companies in America. This and the S&P 500 are 2 common American indices that many Americans refer to when talking about “the stock market”.
As of 9/10/2020, the companies in the DJIA are as follows:
Johnson & Johnson
Procter & Gamble
Walgreens Boots Alliance