Social network is a social structure made of individuals or organizations called "nodes," which are connected by one or more specific types of interdependency, such as friendship, kinship, financial exchange, dislike, sexual relationships, or relationships of beliefs, knowledge or prestige.

Social networking site that is a social structure made of nodes (individuals or organizations) are "tied" or united by a site

The first recognizable social network site launched in 1997 is

SixDegrees.com SixDegrees.com allowed

users to create profiles, list their Friends and, beginning in 1998, surf the Friends lists.

In 2000, the service closed.

From 1997 to 2001, a number of community tools began supporting various combinations of profiles and publicly articulated Friends.

AsianAvenue allowed users to create personal, professional, and dating profiles—users could identify Friends on their personal profiles without seeking approval for those connections

Cyworld was started in 1999 and added SNS features in 2001, independent of these other sites

it contained Friends lists, guestbooks, and diary pages

Ryze.com was launched in 2001 to help people leverage their business networks

In the end, Ryze never acquired mass popularity