computer based communications (i.e. email and the 3G network) is the only one I can think of. . . Written and verbal
Emails, texting, phone calls, letters . etc
Talking, sign language, phone, texting, emailing, or messaging online infrared, light, voice, electromagnetic waves, radio waves.
There are LOTS of different types, here's a list: Phone Email Text Ring Talk Shout Whisper Sign languageI could think of many more, but, from what I've put, can you think of any more.
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