A triumph of mobile computing was achieved on this date in 1961. By our 21st century standards, this involved some truly heavy lifting. Rolling actually. A division of the Sperry Rand Corporation equipped a trailer truck to haul a UNIVAC I computer from New York City down to North Carolina to process data for the Douglas Aircraft Corporation. The UNIVAC I, fully assembled, weighed in at a nimble 7,237 pounds. In 2012, nearly 122 million U.S. households — about 79 percent — had computers. In marked contrast to the unwieldy UNIVAC of 1961, over 45 percent of Americans over the age of 25 were using smartphones for true mobile computing. You can find more facts about America from the U.S. Census Bureau, online at <www.census.gov>.