What is a card reader for digital audio?

I just got a 2006 Honda and has a card reader for digital audio. What is and what type of equipment they need to buy what I can use?

Http: / / search.yahoo.com / search? Search = digital + audio + card + reader & ei = UTF-8 & fr = ks-ans & ico-yahoo-search-value = http% 3A% 2F%%%%% 2Frds.yahoo.com 2F_ylt 2FSIG 3DAmGSuX5ciLc550.ePyQq0acazKIX 3D111gjvvgj% 2F *- http% 3A% 2F%% 2Fsearch & ico 2Fsearch.yahoo.com-wikipedia-search-value = http% 3A% 2F%%%% 2Frds.yahoo.com 2F_ylt 3DAgaTUqm9UsgmippXE_zBFl4azKIX 3D11ia1qo58 2FSIG% 2F% ** http% 253A% 2F%%%% 2Fwiki 2FSpecial 253aSearch 2Fen.wikipedia.org & p = + + + Digital audio card reader http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLD, GGLD :2005-18, GGLD: en & q = digital + Card reader + audio + You can learn a lot more of these links than can fit here.

HONDA CR-V: 4WD EX-L (166 hp, 2.4-liter 16-valve, 23/30 mpg)

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SanDisk 6-in-1 PC Card Adapter ( SDAD-67-A10, Retail Package) $27.99 This 6-in-1 PC Card adapter turns your laptop’s PC Card slot into a memory card reader quickly and easily. Just slip your SD Card, MultiMediaCard, SmartMedia, Memory Stick, Memory Stick PRO or xD-Picture Card media into this adapter and slide it into your computer’s PC Card slot. Now you can read and write to any of the compatible media cards. This adapter works like a removable hard drive on any …

SanDisk SDDR-64-768 Compact Flash to PC Card Adapter $12.99 A useful component that allows insertion of CompactFlash media in a notebook or handheld device’s PC Card slot…

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