It’s a surprisingly easy process. After finalizing your guest list and mailing out invitations, you'll wait for the RSVPs to trickle in. And while some couples opt to include a paper RSVP card, many ...

Everywhere you look at the South by Southwest conference this week, you see QR codes. The square “quick response” codes turn URLs, vCards, or any kind of text into a jumble of pixels that you can scan ...