Language is a key of communication, and communication itself is not limited in the family, society and nation but it can be done in a cyber space or Internet. The abbreviation of internet is international network. People use internet as a means of communication. One of the facilities that can be found on internet is Internet chat or chatting. Chatting is a virtual place when two people or more can have a typed conversation in real time. Meanwhile on internet chat, we can find that yahoo messenger is popular nowadays. People who participate in yahoo messenger use terms and symbols as need for communication to represent common phrases that they say one another. Those combinations always appear in the conversation. They are so unique, and it seems that not all people know those combinations and their meanings. Considering this condition, it also brings the writer to analyze the process of how those terms and symbols are used. The purpose of this study is to know the terms and symbols commonly used by the chatters on the Internet yahoo chat particularly yahoo messenger and to find out the formation of those terms. In this study, the writer used qualitative descriptive research design because it dealt with words and phrases, not statistical analysis. The data source used in this study was conversation among chatters on yahoo messenger channel at Revolusi-net. To collect the data, the instruments used in this study were the writer herself and observation. The writer joined in the chatting among chatters of regional chat room on yahoo messenger channel. She collected and identified terms and symbols commonly used in the conversation among chatters on yahoo messenger channel. Finally, she put them on the table and analyzed them based on their number of characters. The result of this study showed that there were forty-two terms and twenty symbols commonly used by the chatters on yahoo messenger channel. The word formations found on yahoo messenger channel, included acronym, borrowing, clipping, ejaculation and multiple processes. The formation of those terms could be explained more in chapter IV. The writer hoped that by using those combinations, people would enjoy chatting in economical way
