Consumers can look up any ISSN at WorldCat.org, according to the U.S. ISSN Center. The center assigns International Standard Serial Numbers to every serial printed in the United States. More »

There are many online tools available to look up Universal Product Codes including UPC-Lookup.com and UPCDatabase.com. Electronic UPC scanners are also available for purchase at stores such as Target and Wal-Mart. More »

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Most serial numbers can be found on the actual product itself, usually on the back side. Serial numbers can also be found in an accompanying manual or online at the brand's website. More »

Individuals and businesses can apply for D-U-N-S numbers at the Dun & Bradstreet website, DNB.com. Dun & Bradstreet provides the number without charge. Generally, it takes approximately 20 business days for businesses ba... More »

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A stock keeping unit, or SKU, is a distinct combination of letters and numbers assigned to a particular product sold by a business. The primary purpose a stock keeping unit is to allow effective inventory tracking and to... More »

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To find fax numbers for businesses, type the business name into an online phone directory such as White Pages or Yellow Pages. Scroll through the business information and select the number listed as "fax." More »

Virtual offices provide services to small businesses and start-ups, including physical mailing addresses, receptionists, and local phone numbers with call handling and forwarding. This builds a creditworthy and professio... More »

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