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- QRまたはクイックレスポンスコードは、 1994年から出回っていると、もともと自動車の製造時に部品を追跡するために使用されてた。クロスワードパズルを思わせるグリッドパターンの白と黒の四角形として表示される。基本的にQRコードはかなり多くの情報を（数十とは対照的に、数千文字）保持することができるバーコードだ。2010年10月位に、スマートフォンユーザーがWebページを表示するためのトリガーとしてし使用するための一般的なツールとなった。
---This is a guest article contributed by Simon Goble.
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QR or Quick Response Codes have been around since 1994 and were originally used to track parts during car manufacture. It is likely you have seen one, even if you didn’t know what it was, usually displayed as black and white squares in a grid pattern reminiscent of a crossword. Essentially QR Codes are a barcode capable of holding significantly more information (thousands of characters as opposed to tens).Around October 2010 they became a popular tool to quickly link smartphone users through to web pages, provided the phone had a relevant reader installed. Creating your own code is fairly simple with a myriad of free to use generators available, though initially the various options can be slightly overwhelming.
QR codes are a quick and convenient way to transfer information to smart phones (or any digital device with a reader). The information encoded might direct users to a website URL, add contact details, offer special discounts and much more. They are often seen in magazines and on posters and flyers, where details on an event or product can be transferred. More specialised uses involve supplying extra details on name tags and business cards (vCards or personalised webpages), television adverts that are continued interactively and ordering online from closed high street shops.QR Codes have also been used as coupon codes, online tickets and in scavenger hunts. Reiterating the paper message is a frequent but uninteresting practise, it is often more effective to create useful and interesting applications that will get people talking. What follows are a few of the better examples.
(via http://justcreativedesign.com/2011/11/02/qr-codes-guide/)
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