The world seems to revolve around the internet. Yet, one in five American households is not connected to the online universe.

New data from the Census Bureau shows 21 percent of homes have no internet access, according to USA Today. Lower-income and minorities (not including Asians) tend to have a larger percentage of unconnected homes.

People have multiple reasons for not having internet. A 2013 Pew Research Center survey found a majority of 21 percent simply are "just not interested." Others cited the Internet was too frustrating or they were "too old to learn." The disconnected still performed internet searches, asking their friends and family to look it up for them.

More than half of households with an income of less than $20,000 don't have internet. The number shrinks considerably, with only 8 percent of households unconnected when they make $75,000 or more. Only 6 percent cited affordability as the reason they didn't connect, according to Pew

Americans prefer a cable modem (36 percent) or DSL (15 percent) to access the internet at home. Of the three-quarters of households that pay to go online, only 1 percent still uses dial-up.

Computer ownership has jumped significantly since personal computers became popular in the 1980s. Today, 84 percent of households have a computer compared to 8 percent three decades ago. Nearly 70 percent have a smartphone, tablet or other handheld computer, many in addition to their computer, according to the Census Bureau.

The greatest deviation in computer ownership comes from younger and older generations. More than 90 percent of people under 65 own a computer, compared to 71 percent of people 65 and older.