"I am sure that most of us have come across voice recognition feature in some form or another. The voice control feature is becoming standard on a lot of so called Smart devices - especially Smartphones. With some brands - they even tout it as one of the key features - for example, most iPhone...
These two terms Active and passive are used for 3D TV and 3D glasses. 3D passive glass is compatible with passive TV and active glass with active TV. Both kind of TVs and glasses are available in the market. Passive is considered more comfortable and inexpensive .
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