Answer: The Internet started in the 1960s as a way for government researchers to share information. ... This eventually led to the formation of the ARPANET (Advanced Research Projects Agency Network), the network that ultimately evolved into what we now know as the Internet.
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Put a code or security system on or a very secure password
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Answer:
I think you have to ask you're teacher, not brainly because people on here can't answer this for you
In chemical reactions, as a carrier of materials or keeping the temperature of cells from quickly changing.