The 30-year-old system that classifies hair texture with letters and numbers overlooks science and enforces racial biases.

Gray code is a systematic ordering of binary numbers in a way that each successive value differs from the previous one in ...

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Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. A Social Security number (SSN) is a numerical ID for U.S. citizens and residents to track ...