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    • The Bar-Code Revolution in Retail

      The Bar-Code Revolution in Retail

      The Wall Street Journal· 3 hours ago

      By enabling verification, cash registers expanded trust. The cashier system was so successful for so long that when bar codes were introduced in the...

    • Is the Vanguard S&P 500 ETF Still a Buy?

      Is the Vanguard S&P 500 ETF Still a Buy?

      The Motley Fool via AOL· 4 hours ago

      However, some skeptics are raising concerns about the sustainability of this aging bull market. The S&P 500's cyclically adjusted price-to-earnings ratio...