Zachary Loeb, Purdue University assistant professor, tells NPR's Juana Summers that the real story of Y2k wasn't about computers run amok. It was about experts sounding an alarm, and fixing problems.

The “Y2K bug” was a dud, and our computers kept plugging away, but until the clock struck midnight, no one knew for sure what would happen when the calendar rolled over from 1999 to 2000.

The year was 1999 - and governments and corporations were fearful about the unknown millenium computer bug. Here’s what to know about Y2K on its 25th anniversary.

Y2K came and went with few glitches. But in the 25 years since the calendar flipped to 2000, a lot of what we feared would happen then has happened.

Take a look back at the days and months ahead of Jan. 1, 2000, when fears about the Y2K dominated the headlines.

Zachary Loeb, Purdue University assistant professor, tells NPR's Juana Summers that the real story of Y2k wasn't about computers run amok. It was about experts sounding an alarm, and fixing problems.

Zachary Loeb, Purdue University assistant professor, tells NPR's Juana Summers that the real story of Y2k wasn't about computers run amok. It was about experts sounding an alarm, and fixing problems.

Zachary Loeb, Purdue University assistant professor, tells NPR's Juana Summers that the real story of Y2k wasn't about computers run amok. It was about experts sounding an alarm, and fixing problems.