The article “Network Introduction” is a intro level review on the very complex system of network. Briefly, network is a pattern of relationships that connect people, ideas, institutions or objects. Network reveals the relationships between different individuals. With more individuals in the network, it also makes it much more difficult to break down the relationship between them. A network is essentially a graph made of nodes and links. Each node represents each individual, and links are the connections between those nodes. Together they reveals the whole network. What’s even more fascinating is that according to Six Degree of Separation theory, each two random individuals in the network within six steps. It is also a representation of our real-life social network, and the entire earth population is in this network. With people now getting closely connected more than ever before through social media, it is believed that this six steps are getting even smaller.

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