SPAM was introduced 80 years, but it was a military-style corps of singing women that helped the canned meat skyrocket in the years after World War II.

More money, more hair, less belly fat, better health: our spam emails expose our worries and weaknesses.

Law enforcement recently took out a bot network capable of sending 1.5 billion spam emails a day. So what are the economic incentives—and costs—of spam?

Late last month, the Wall Street Journal reported that Amazon plans to roll out its own online advertising ...