Visitors to this year’s NBAA show can wave goodbye to sore shoulders with a brand new app from SmartBag. The company’s new Digital Tradeshow Bag uses Quick Response (QR) code technology, which enables iPhone users to scan icons displayed on participating booths.  Attendees can then download exhibitors’ marketing materials directly to their own devices. The software saves time and money, while cutting paper waste. The SmartBag is available for Apple platforms today, with Android and Blackberry versions coming soon. Users wishing to try the new tool should go to www.digitalsmartbag.com and look out for QR codes at the show.