35).packets

packets-A short block of data transmitted in a packet switching network.
http://www.answers.com/topic/packet

34).Mailing List

Mailing List-A list of users of the Internet or another computer network who all receive copies of electronic mail messages.  
http://www.answers.com/topic/mailing-list

33). Instant Messaging

Instant Messaging- The transmission of an electronic message over a computer network using software that immediately displays the message in a window on the screen of the recipient.

http://www.answers.com/topic/instant-messaging

32). e-mail Address

e-mail Address-A string, usually of the form username@host.com or username@host.net, that must be entered into the To: field of an e-mail message to ensure proper delivery.
http://www.answers.com/topic/e-mail-address

31).Electronic Mail (e-mail)

Electronic Mail (e-mail)-A system for sending and receiving messages electronically over a computer network, as between personal computers.
http://www.answers.com/topic/e-mail

30). Distribution List

Distribution List-a group of mail recipients that is addressed as a single recipient. 
http://searchexchange.techtarget.com/definition/distribution-list

29).Attachment

Attachment- A supplementary document that is attached to a primary document 
http://www.answers.com/topic/attachment