15 February in history.

1946

ENIAC is shown to the world. The first general-purpose electronic computer was officially dedicated at the University of Pennsylvania. It filled a whole room and could do thousands of sums a second.

Wikipedia: ENIAC

Photo: The original uploader was TexasDex at English Wikipedia . / Wikimedia Commons (CC BY-SA 3.0)

More from 15 February

1. 

   1879

   Women lawyers gain a voice in the Supreme Court

   US President Rutherford B. Hayes signed a law allowing women lawyers to argue cases before the Supreme Court.

   Wikipedia: Belva Ann LockwoodWikipedia: Rutherford B. Hayes

   Photo: Mathew Benjamin Brady / Levin Corbin Handy / Wikimedia Commons (Public domain)

2. 

   1965

   Canada raises the Maple Leaf

   The red and white flag with a single maple leaf flew for the first time as Canada's national flag.

   Wikipedia: Flag of Canada

   Photo: Original: George F. G. Stanley Modified by: The original uploader was Illegitimate Barr… / Wikimedia Commons (Public domain)

3. 

   1971

   Decimal Day

   Britain and Ireland switched to money counted in hundreds: 100 pence to the pound, instead of 240 old pennies.

   Wikipedia: Decimal DayWikipedia: Decimalisation

   Photo: Mandtplatt / Wikimedia Commons (CC BY-SA 4.0)

4. 

   2001

   A first map of human DNA

   The journal Nature printed the first draft of the full human genome, the complete set of human DNA. It opened a new era for medicine and biology.

   Wikipedia: Human genomeWikipedia: Human Genome Project

   Photo: U.S. Department of Energy, Human Genome Project / Wikimedia Commons (Public domain)

Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.