Restricted to alternatives:
1973: the MCM (Manual Communications Module) - portable device which allowed two-way communication

Short Message Service (AKA text messaging) - feature of many mobile phones “the true dawn of Deaf blogs arose during the recent Gallaudet Protest [Ed. 2006] when many spectators were thirsty for up-to-the-minute information.
“The Deaf Community was already tight-knit, but the blogs brought us closer together and built new relationships that didn’t exist before.“ (Jared Evans, deafread.com, in NADmag Jan 2007)
Teri Sentelle, terisentelle.com
Responding in ASLThis presentation is available online:
http://redmonk.net/files/2007/04/SLG102_presentation/
Creative Commons Attribution 3.0 License.