QR Code Development
In 1970, IBM developed UPC (Unique Product Code) symbols consisting of 13 digits of numbers to enable automatic input into computers. These UPC symbols are still widely used for Point-Of-Sale (POS) system. In 1974, Code 39 which can encode (symbolise) approximately 30 digits of alphanumeric characters was developed. Then in the early 1980s, multi staged symbol codes where approximately 100 digits of characters can be stored such as Code 16K and Code 49 were developed. In the recent years, requests had mounted for symbols which could store more information and represent languages other than English. To enable this, a symbol with even higher density than multi staged symbols was required. As a result, QR Code, which can contain 7,000 digits of characters at maximum, was invented.
No comments:
Post a Comment