Discover how the Luhn Algorithm verifies credit card accuracy, supports secure transactions, and helps prevent errors in inputting Social Security numbers.

TIOBE Index for December 2025: Top 10 Most Popular Programming Languages Your email has been sent December’s TIOBE Index lands with a quieter top tier but a livelier shuffle just beneath it. The main ...

Mikayla Morell is a content writer and editor residing in Philadelphia, PA. She began her career as a writer while also working as a phlebotomist in a local hospital. She wanted to use her ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Marguerita is a Certified Financial Planner (CFP), Chartered Retirement Planning Counselor ...

Acclaimed as a mathematical genius, Ada Lovelace is said to have understood the potential of the first computer blueprints better than their inventor. A serendipitous friendship with the mathematician ...

I'm an expert in software and work-related issues, and I have been contributing to PCMag since 2011. I launched the column Get Organized in 2012 and ran it through 2024, offering advice on how to ...