Answer:
October 12, 1492
Explanation:
Columbus left Castile in August 1492 with three ships, and made landfall in the Americas on 12 October (ending the period of human habitation in the Americas now referred to as the pre-Columbian era). His landing place was an island in the Bahamas, known by its native inhabitants as Guanahani.
Answer:
One of the first and most famous of these, the Electronic Numerical Integrator Analyzer and Computer (ENIAC), was built at the University of Pennsylvania to do ballistics calculations for the U.S. military during World War II.
Explanation: