E-mail – electronic mail – a method of communication in which an electronic message is sent to a distant location where another user receives it through their unique e-mail address.

Emoticons - "smileys" – Symbols used in e-mails to express different emotions. For example:
  :-)        smiling
  :-(        sorrow, sad
  ;-)        winking
  :-P       sticking out your tongue etc.

Extension card – Hardware which is inserted into the PC system in order to upgrade its capacity e.g. sound card or video capture card.

Extension connector - A slot in the mother boards ensuring electric connectors for installing an extension card (e.g. sound card).