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Technology: Engineering Our World
Symbols and Signs
Simple pictures and shapes are one of the most effective methods of
communication. These symbols can warn, instruct, and direct with out using
words. They “speak” in a hundred languages all at the same time. See Figure 3-5.
Electronic Communication
Today, people increasingly send wireless transmissions that bounce
off satellites. This allows you to access information or people no matter
where you happen to be.
Electronic communication takes many forms. You may decide to
establish a MySpace.com™ or Facebook® profile, or send a text message
to someone’s phone. You could establish or contribute to a blog. You might
decide to use an online chat program or check out an e-commerce site.
You can communicate using an instant messaging program or check out
an online community. YouTube is a site that offers amateur or professional
videos that vary from funny to autobiographical.
gure 3-5. Signs often have symbols that are easily understood at a glance. What message
is communicated by each of these symbols?