People who can’t live without a smartphone may be surprised to learn that they’ve been in the minority until this year, according to a new survey from the Pew Research Center‘s Internet & American Life Project. About 56% of the 1,127 adults questioned in May said that they own a computer-like, Web connected phone, up from 46% in a similar study last year. Pew says that another 35% in the new survey own a conventional mobile phone, and 9% don’t own a cell phone. As you’d expect, young adults are most likely to own smartphones: About 81% of 25-to-34 year olds have one; the number drops below half the population at age 55 and older. About 39% of those between 55 and 64 own one, sliding to 18% for those 65 and older. When it comes to smartphone operating systems, Google and Apple successfully held off threats from Blackberry and Microsoft: Among all cell phone owners 28% have a smartphone powered by Android (up from 20% last year) while 25% have an iPhone (up from 19%). Another 4% use Blackberry (down from 6%) and 1% are on Windows (down from 2%). But researchers found distinct differences in preference by demo. For example, Android beats Apple among those 54 and younger while Apple wins among college grads and in homes with incomes above $75,000 a year.