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2. PDF417 - Wikipedia

   en.wikipedia.org/wiki/PDF417

   PDF417 is a stacked barcode that can be read with a simple linear scan being swept over the symbol. [4] Those linear scans need the left and right columns with the start and stop code words. Additionally, the scan needs to know what row it is scanning, so each row of the symbol must also encode its row number.

3. Barcode reader - Wikipedia

   en.wikipedia.org/wiki/Barcode_reader

   A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [1] Like a flatbed scanner , it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.

4. Interleaved 2 of 5 - Wikipedia

   en.wikipedia.org/wiki/Interleaved_2_of_5

   Such a "short scan" which does not extend through all of the bars obviously cannot result in a correct read of the complete bar code, but by the nature of the interleaved 2 of 5 code, it is possible for a short scan that begins in the middle of the bar code to begin with a pattern that corresponds to the required start pattern, or for a short ...

5. Barcode - Wikipedia

   en.wikipedia.org/wiki/Barcode

   The earliest, and still [when?] the cheapest, barcode scanners are built from a fixed light and a single photosensor that is manually moved across the barcode. Barcode scanners can be classified into three categories based on their connection to the computer. The older type is the RS-232 barcode scanner. This type requires special programming ...

6. A comprehensive guide to JavaScript design patterns - AOL

   www.aol.com/comprehensive-guide-javascript...

   Design patterns are reusable solutions to commonly occurring problems in software design. As a good JavaScript developer, you strive to write clean, healthy, and maintainable code. ...

7. Category:Software design patterns - Wikipedia

   en.wikipedia.org/wiki/Category:Software_design...

   A (software) design pattern is a general solution to a common problem in software design. It is a description or template for how to solve a problem, that can be used in different situations. A design pattern typically shows relationship and interaction between classes or objects, without specifying final application classes or objects that are ...