Top level Domain ". com" 25 years old.

Orientaion Internet-wide top-level domain ". com" 15th spent its 25-year-old birthday.　　In these 25 years, the development of ". com" has both a trough and a climax, but its existence has undoubtedly made many large companies with network as its operating platform. March 15, 1985, the United States, a computer company in Massachusetts registered the world's first ". com" domain name "symbolics.com". But people's attitude towards this new thing seems more conservative. Throughout 1985, only 5 companies registered the ". com" domain name. Until the end of 1987, the number of ". com" domains in the world reached 100. By 1992, the number of ". com" domain names was less than 15,000, but its growth rate had accelerated.　　The number of ". com" domain names has exceeded the million mark in 1997. The rapid development of the Internet has driven the arrival of the ". com" domain name "tide". In the 2 years after 1997, the number of newly registered domain names is close to 20 million.　　Many institutions, companies and individuals to register the domain name of the upsurge also gave birth to the "network of cockroaches" clan, they registered large companies and celebrity domain name, and through reselling money. The bursting of the dotcom bubble in 2000 has allowed the ". com" domain name "tide" to subside.　　Subsequently, the ". com" Domain registration growth rate is basically maintained at a stable level. Today, there are about 80 million ". com" domain name sites in the world. These include about 11.9 million E-commerce or online trading sites, 1.8 million sports-related sites and 4.3 million entertainment sites.　　The most popular sites like the video exchange website YouTube and the social networking site Twitter have been registered in recent years. The company, which is responsible for Internet domain name registration, cites a separate survey that says these ". com" sites can make up to $400 billion a year, with earnings expected to reach $950 billion by 2020.