The idea of creating folders in an e-mail reader is not advanced calculus.

FORBES: Serve Your Customer. It Pays Off. Big Time.

Advertisers are willing to shell out big bucks for e-mail newsletters, since reader engagement is much higher compared to the passing attention paid to blogs or Web sites.

FORBES: Internet

Amazon also removed an e-mail address included in a reader's review, which let Web surfers contact the reviewer directly.

FORBES: Magazine Article

If you buy a hybrid, you're kind of making a statement, which is that you're supporting the development of a new kind of technology, and I got a lot of reader e-mail suggesting that that was an important point, that they want to put their money where their mouth is, so to speak, and support this kind of technology.

NPR: Do Hybrid Cars Save Money?

Ombudsman Patrick Pexton reports on an e-mail dialogue he facilitated between a reader and a Post reporter he declines to name.

CNN: Media walk tricky line on same-sex marriage

In third phase, users were allowed secure access to their government e-mail, calendar and contacts after authenticating using a federally-mandated CAC smart card reader.

FORBES: How Does The Pentagon Deploy iPads? Very, Very Carefully [Macworld]

"I have a newly patented product, but I'm lost on where to go with it or how to sell it, " FORBES reader Dennis Doane informed us in a recent E-mail.

FORBES: Getting the mousetrap to market

"I have a newly patented product, but I'm lost on where to go with it or how to sell it, " FORBES GLOBAL reader Dennis Doane informed us in a recent E-mail.

FORBES: Getting a better mousetrap to market