What are QR codes?

We are now living on a planet which is progressing day by day.
Each and every day many inventions are taking place in our planet on technology.So we should also be ahead with.One of them is the QR code.
Do you know what it is?
Here are some useful meaning notes for the ones whom want to know what simply it is.

A QR code (abbreviated from Quick Response code) is a type of matrix barcode (or two-dimensional code) first designed for the automotive industry. More recently, the system has become popular outside of the industry due to its fast readability and comparatively large storage capacity. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be made up of any kind of data (e.g., binary, alphanumeric, or Kanji symbols)


Although initially used to track parts in vehicle manufacturing, QR codes are now (as of 2011) used over a much wider range of applications, including commercial tracking, entertainment and transport ticketing, product marketing and in-store product labeling. Many of these applications target mobile-phone users . Users may receive text, add a vCard contact to their device, open a Uniform Resource Identifier (URI), or compose an e-mail or text message after scanning QR codes. They can generate and print their own QR codes for others to scan and use by visiting one of several pay or free QR code-generating sites or apps. Google has a popular API to generate QR codes, and apps for scanning QR codes can be found on nearly all smartphone devices.
QR codes storing addresses and Uniform Resource Locators (URLs) may appear in magazines, on signs, on buses, on business cards, or on almost any object about which users might need information. Users with a camera phone equipped with the correct reader application can scan the image of the QR code to display text, contact information, connect to a wireless network, or open a web page in the telephone's browser. This act of linking from physical world objects is termed hardlinking or object hyperlinking.
QR codes can be used in Google's mobile Android operating system via both their own Google Goggles application or 3rd party barcode scanners like ZXing or Kaywa. The browser supports URI redirection, which allows QR codes to send metadata to existing applications on the device. Nokia's Symbian operating system features a barcode scanner which can read QR codes, while mbarcode is a QR code reader for the Maemo operating system. In the Apple iOS, a QR code reader is not natively included, but more than fifty paid and free apps are available with both scanning capabilities and hard-linking to URI. With BlackBerry devices, the App World application can natively scan QR codes and load any recognized Web URLs on the device's Web browser. Windows Phone 7.5 is able to scan QR codes through the Bing search app.

How does the cell phone read the code?

The cell phone needs a QR code reader, like this one from Kaywa. It takes literally 1 minute for someone with an iPhone or Android phone to find and install the reader.

How do you generate a code?

You can easily generate a QR code using a site like Kaywa.com or you can use the Open Source code to generate codes for you if you have a smart developer on hand. Google also has a tool — see our separate article about that:Close-Up With Google’s New QR Code Generator.

How can you use QR codes to benefit search marketing?

We are only just scratching the surface of how they will be used. We have added one to every business listing in our directory. Here are a few examples of how others are using them.

here are some interesting video links