What Online Dating Was Like In The 1960s Before eHarmony, there was Compatibility Research Inc.

In our modern age of Tinder, OkCupid and Match.com, we’re used to the idea that algorithms can help us find love. But while the algorithms may have improved as the market for online dating has expanded, the inputs — the questions these computer matchmakers ask dating hopefuls — haven’t changed much since the 1960s, when Compatibility Research Inc. launched the first computerized dating service.

In the latest film in our “Signals” series, we meet the creators of Operation Match, as well as some of their customers, who are still married to the person the service found for them.