As the computer age dawned, he saw how the new technology could be harnessed to mathematics to solve problems in everything from designing weapons to predicting the weather.

The magazine’s Ethicist columnist on what to do when you’re conflicted about using an service you may rely on.

New vaccines are often evaluated in trials in which some participants receive a placebo. But not all studies can be designed this way.

More from our inbox: No Trump Third TermA Display of FaithLoud Music in PublicCredit…Sam Whitney/The New York TimesTo the Editor: Re “Medicaid Cuts Would Gut My Rural Hospital,” by Kevin Stansbury (Opinion guest essay, May 3): Mr. Stansbury makes …

The composer’s musicals, including “Annie” and “Bye Bye Birdie,” captured essential elements of American culture. Here are five of his most memorable songs.

With his wife and infant sons, he took refuge in unlikely places, including an opera house, an abandoned car and a subway station converted to a bunker.