From class:
Communication tools
Forums
Talking/speaking
Pen and paper (written)
CB radios (citizens band)
Email
Phone
Letter in a bottle
Texting
Party Lines
Webcam
Facebook
Twitter
Handgestures (sign language)
Walkie Talkie
Videochat / skype
Google Docs (collaborative authorship)
Blog
Wikis
Commenting (YouTube)
IM
meetup.com
Second Life (virtual communities)
Chat roulette
Foursquare
Email/chat/messenger
Geotagging (???) Geocaching
Feel free to add others in the comments field!
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