3.2 billion

This website spells out the word ""DELUGE"" using letters from the names of 20 countries (including the US) which have 3.2 billion offline; nearly 75% of the 4.4 billion non-Internet users worldwide! It also uses letters from rural, low income, elderly, illiterate, female, incetives, affordability, user capability and infrastructure, which describe them and their barriers.