There are a lot of ways to communicate throw internet such as :e-mail, on-line chat forums, private messengers , web2sms services and peer to peer programs for file transfer.
Here are some reviews

• E-mail witch means electronic mail is a method to send mails throw communication systems and established in 1965. Is based on SMTP witch means Simple mail transfer protocol witch is a system allowing users using the same workgroup to sent or receive mails.
• Forum is another way throw witch we can communicate. Forum is an Internet application. It gives us the opportunity for discussion in on-line communities. Forums are coming from news groups or mailing list witch allow users to send messages ad comments on other messages which they have already resive. The new software for forums provides a lot of new applications such as username based lists and photo galleries. Further more ay user can create his/her own personal profile with personal information, avatars and his/her signature. To control this discussion board there are some users in every forum who work as moderators and are responsible to keep the conversations up to some standards. Finally software for forums can be written in a plenty of languages such as JAVA, PHP and ASP.
• On-line chat is an instant messaging application. On-line chat is based on chat rooms. In every chat room there is a different discussion theme. Some of these systems also allow voice chats. The first on-line chat system was UNIX talk. Further more in 1988 internet relay chart (IRC) protocol established and is the protocol witch is used nowadays for online chat communication.
• Private messenger is another way throw witch we can communicate. Private messengers such as msn and yahoo messenger gives as the opportunity to have live chat with our friends in a close and safe environment in witch no one can see our conversation. Also nowadays those messengers provide video conference, or voice conversation. Furthermore we can change files or setup a peer to peer connection with a friend for continuously data transfer.
• SMS throw web is one more way throw witch we can communicate. There are a lot of companies such us O2 in England ore Otenet in Greece witch give us the opportunity to send sms to mobile phones throw internet. Also they give as the opportunity to have on-line phone catalog and support multi send so we can write the message one and send it a lot of times