What is a tv tuner card???????//

hi guys i want to know what is a tv tuner card and what it does :??:
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More about what tuner card
  1. To get tv signals over atsc i believe. basically free tv :p
  2. scout_03 said:

    thanks :) can u tell me what is the difference between external and internal tv tuner and which is better???????????
  3. internal are in the computer like a expansion card the external are in a box outside lolook at this http://www.newegg.com/store/SubCategory.aspx?Subcategory=47&DEPA=0&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-VideoCards-_-NA-_-NA
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