The Haptic Instant Messenger (HIM) provides all features of an ordinary messenger, such as listing who is online and sending text messages. From a technical point of view a hapticon consists of vibration patterns (specified by frequency, amplitude, duration). The user can select the input and output devices that are used to generate haptic effects. A set of predefined hapticons and interfaces is provided, and it is easy to design new signals. Haptic effects can be triggered by using special input devices, or by using their corresponding textual representation in the text message (just like emoticons).
Source: Rovers, A. F. and van Essen, H. A. 2004. HIM. In Extended Abstracts of the Conference on Human Factors and Computing Systems (CHI’04). ACM Press, 1313–1316.
http://www.sis.uta.fi/~hui/mobile/papers/Kawakami-paper.pdf
 provides all features of an ordinary messenger, such as listing who is online and sending text message...){kind=link}