The mail or post is a system for physically transporting postcards, letters, and parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid-19th century, national postal systems have generally been established as government monopolies, with a fee on the article prepaid. Proof of payment is often in the form of adhesive postage stamps, but postage meters are also used for bulk mailing. Modern private postal systems are typically distinguished from national postal agencies by the names "courier" or "delivery service".
Postal authorities often have functions other than transporting letters. In some countries, a postal, telegraph and telephone (PTT) service oversees the postal system, in addition to telephone and telegraph systems. Some countries' postal systems allow for savings accounts and handle applications for passports.
Mail.Ru Group, ООО (commonly referred to as Mail.Ru) is a Russian Internet company. It was started in 1998 as an e-mail service and went on to become a major corporate figure in the Russian-speaking segment of the Internet. As of 2013 according to comScore, websites owned by Mail.ru collectively had the largest audience in Russia and captured the most screen time.[4]
Mail.Ru's sites reach approximately 86% of Russian Internet users on a monthly basis and the company is in the top 5 of largest Internet companies, based on the number of total pages viewed. Mail.Ru controls and operates the 3 largest and most popular Russian social networking sites, VKontakte, Odnoklassniki, and Moi Mir, respectively.