country code for united states -1

Codes of some cities: Washington (202), New York (212) or (646), Los Angeles (213), San Francisco (408), Detroit (313), Dallas (214), San Diego (619) , Boston (617), Houston (713), Atlanta (404), St. Louis (314), Cleveland (216).
        Payphones are blue (government) and red (private), call of which is 2 times more expensive. Payment made coins or special phone or credit cards. Talking on the phone from a hotel is much more expensive.
      For Emergency assistance in case of emergency (fire protection, police, ambulance): tel. 911.

The rules set long distance and international calls from a landline:
For international calls from a landline phone, dial:
8 - beep - 1 - country code for united states- city code - phone number
The rules set long distance and international rates from your cell phone
For international calls from your cell phone dial:
 + country code for united states- city code - phone number

 Bar code is a sequence of black and white stripes, representing some of the information in a form suitable for reading by technical means. The information contained in the code can be print in readable form under the code (decoding). Bar codes are using in trade, inventory control, library science, security systems, postal business, assembly production, processing documents. Internationally, trade made use of EAN bar code symbol logy for product labeling. In accordance with the order, the manufacturer of the goods does it bar code, generated using data on the country of the manufacturer and the producer code. Manufacturer code is assigning to the regional office of an international organization of EAN International. This registration procedure eliminates the possibility of two different products with the same codes.

There are different ways of encoding information, called (bar code character sets or symbols). Distinguish between linear and two dimensional bar code symbols.

Linear (conventional), unlike the two-dimensional bar codes are called, which are read in one direction (horizontally). Ubiquitous linear symbol: EAN, UPC, Code39, Code128, Codebar, Interleaved 2 of 5. Linear symbols let encode a small amount of information (up to 20-30 characters - usually numbers) by using simple bar codes, read inexpensive scanners. Example code symbol EAN-13:

Called two-dimensional symbol designed to encode a large amount of information (up to several pages of text). Two-dimensional code to read using a special scanner, two-dimensional codes and allows you to enter quickly and accurately a large amount of information. Explanation of such a code is carried out in two dimensions (horizontally and vertically). Data matrix, Data Glyph, Aztec.
A bar code can be applying in the production of packaging (printed), or use self-adhesive labels are printed using special printers.

Decoding barcode - C using a bar code encoded information about some of the most important parameters of production. The most common are the American Universal Product Code UPC and the European coding system EAN. The most common EAN / UCC item number EAN-13, EAN-8, UPC-A, UPC-E and 14-bit code transport packaging ITF-14. There is also a 128-bit system UCC/EAN-128. According to one or another system, each type of product is assigning a number consisting mostly of 13 digits (EAN-13).

For product code:
1 digit: product name,
2 digits: consumer characteristics,
3 digits: dimensions, weight,
4-digit: the ingredients
5 digits: color.

Barcode of USA – 00-09