People remember many things about Windows 95, which turned 30 a couple of months ago. There were its signature new features, such as the Start Button, taskbar, and long file names. The launch event—hosted by Jay Leno—at Microsoft’s campus. The TV commercials with the Rolling Stones’ “Start Me Up.” The crowds of PC users so eager to get their hands on the upgrade that they descended on computer stores at midnight.

Here’s a fact about Windows 95 that isn’t exactly iconic: It was the first voice-enabled version of Microsoft’s operating system. A collection of technologies known as the Microsoft Speech API (SAPI) provided support for speech recognition and synthesis, letting developers create apps that could speak and be spoken to. But SAPI didn’t go on to revolutionize how people used Micros

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