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A communication system including a first apparatus having a first storage medium, and a second apparatus for transmitting data to the first apparatus. The second apparatus has a second storage medium for storing management information of data to be transferred to the first storage medium, a communic

A communication system including a first apparatus having a first storage medium, and a second apparatus for transmitting data to the first apparatus. The second apparatus has a second storage medium for storing management information of data to be transferred to the first storage medium, a communicator for communicating data with the first apparatus, an editor capable of editing the management information and a controller for making a control to transfer data stored in the second storage medium to the first storage medium by way of the communicator based on the management information edited by the editor.

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1. A transmission apparatus comprising: a communication unit configured to transmit to an external apparatus identification information of content data stored in the transmission apparatus and to receive additional information associated with the content data from the external apparatus;a searching

1. A transmission apparatus comprising: a communication unit configured to transmit to an external apparatus identification information of content data stored in the transmission apparatus and to receive additional information associated with the content data from the external apparatus;a searching unit configured to search content data from said transmission apparatus based on a comparison between the additional information received from the external apparatus and a search term;a display unit configured to display a first list indicating content data matching the search term;an editing unit configured to edit a second list of content data based on the first list, said second list registering a plurality of content data; anda transmission unit configured to transmit a plurality of content data to a reproduction apparatus based on the edited second list,wherein the display unit displays a warning that the reproduction apparatus is not connected to the transmission apparatus if the reproduction apparatus is not connected to the transmission apparatus. 2. The transmission apparatus according to claim 1, further comprising: a comparison unit configured to compare an identifier of said reproduction apparatus with an identifier stored in said transmission apparatus, wherein said transmission unit transmits said content data registered in said second list to said reproduction apparatus when said identifiers match each other. 3. The transmission apparatus according to claim 1, wherein said comparison unit compares said second list and a list of content data stored in said reproduction apparatus, and said transmission unit transmits content data which is registered in said second list and is not stored in said reproduction apparatus to said reproduction apparatus. 4. The transmission apparatus according to claim 3, further comprising: a deletion unit configured to delete from said reproduction apparatus content data which is not registered in said second list and is stored in said reproduction apparatus. 5. The transmission apparatus according to claim 1, wherein said editing unit is configured to edit the second list based on a user input before the content data is transmitted by the transmission unit. 6. The transmission apparatus according to claim 5, wherein said display unit displays the first list in a first window and said second list in a second window, and said user input is a drag and drop operation between said first window and said second window. 7. The transmission apparatus according to claim 6, wherein said display unit displays said first window at a left side of the display unit and said second window at a right side of the display unit. 8. The transmission apparatus according to claim 5, further comprising: a touch sensor configured to receive said user input. 9. The transmission apparatus according to claim 1, wherein said second list is associated with said identifier of the reproduction apparatus. 10. The transmission apparatus according to claim 2, wherein said comparison unit extracts one list from a plurality of lists as said second list, and said second list is associated with the same identifier as said identifier of said reproduction apparatus. 11. The transmission apparatus according to claim 1, wherein said transmission unit transmits said second list to said reproduction apparatus with the content data. 12. The transmission apparatus according to claim 1, wherein said transmission unit omits transmission to said reproduction apparatus of content data which is included in said second list. 13. The transmission apparatus according to claim 1, wherein said transmission unit charges a battery of said reproduction apparatus in parallel with said transmission. 14. The transmission apparatus according to claim 1, further comprising: a ripping unit configured to rip content data from a CD into said transmission apparatus. 15. The transmission apparatus according to claim 1, wherein said content data is made by compression-encoding technology. 16. The transmission apparatus according to claim 1, wherein said first list or said second list includes at least one of a title, an artist, a composer, a lyricist, a lyric, and a jacket image of content data. 17. The transmission apparatus according to claim 16, further comprising: a communication unit configured to obtain at least one of said title, said artist, said composer, said lyricist, said lyric, and said jacket image of content data from an external server via an internet. 18. The transmission apparatus according to claim 1, wherein said transmission unit is wireless transmission unit. 19. The transmission apparatus according to claim 1, wherein said reproduction apparatus is portable. 20. A transmission method comprising: transmitting to an external apparatus identification information of content data stored in a transmission apparatus;receiving additional information associated with the content data from the external apparatus;searching content data from said transmission apparatus based on a comparison between the additional information received from the external apparatus and a search term;displaying a first list indicating content data matching the search term on a display unit;editing a second list of content data based on the first list, said second list registering a plurality of content data;transmitting a plurality of content data to a reproduction apparatus based on the edited second list; anddisplaying a warning that the reproduction apparatus is not connected to the transmission apparatus if the reproduction apparatus is not connected to the transmission apparatus. 21. The transmission method according to claim 20, further comprising: comparing an identifier of said reproduction apparatus with an identifier stored in said transmission apparatus; andtransmitting said content data registered in said second list to said reproduction apparatus when said identifiers match each other. 22. The transmission method according to claim 20, further comprising: comparing said second list and a list of content data stored in said reproduction apparatus; and transmitting content data which is registered in said second list and is not stored in said reproduction apparatus to said reproduction apparatus. 23. The transmission method according to claim 22, further comprising: deleting from said reproduction apparatus content data which is not registered in said second list and is stored in said reproduction apparatus. 24. The transmission method according to claim 20, further comprising: editing the second list based on a user input before the content data is transmitted. 25. The transmission method according to claim 24, further comprising: displaying the first list in a first window and said second list in a second window; anddragging and dropping the first list from said first window to said second window to edit the second list. 26. The transmission method according to claim 25, further comprising: displaying said first window at a left side of the display unit and said second window at a right side of the display unit. 27. The transmission method according to claim 24, further comprising: receiving said user input through a touch sensor. 28. The transmission method according to claim 20, wherein said second list is associated with said identifier of the reproduction apparatus. 29. The transmission method according to claim 21, further comprising: extracting one list from a plurality of lists as said second list; andassociating said second list with the same identifier as said identifier of said reproduction apparatus. 30. The transmission method according to claim 20, further comprising: transmitting said second list to said reproduction apparatus with the content data. 31. The transmission method according to claim 20, further comprising: omitting transmission to said reproduction apparatus of content data which is included in said second list. 32. The transmission method according to claim 20, further comprising: charging a battery of said reproduction apparatus in parallel with said transmitting. 33. The transmission method according to claim 20, further comprising: ripping content data from a CD. 34. The transmission method according to claim 20, wherein said content data is made by compression-encoding technology. 35. The transmission method according to claim 20, wherein said first list or said second list includes at least one of a title, an artist, a composer, a lyricist, a lyric, and a jacket image of content data. 36. The transmission method according to claim 35, further comprising: obtaining at least one of said title, said artist, said composer, said lyricist, said lyric, and said jacket image of content data from an external server via an internet. 37. The transmission method according to claim 20, wherein said transmitting is performed with a wireless transmission unit. 38. The transmission method according to claim 20, wherein said reproduction apparatus is portable. 39. A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a transmission method comprising: transmitting to an external apparatus identification information of content data stored in a transmission apparatus;receiving additional information associated with the content data from the external apparatus;searching content data from said transmission apparatus based on a comparison between the additional information received from the external apparatus and a search term;displaying a first list indicating content data matching the search term on a display unit;editing a second list of content data based on the first list, said second list registering a plurality of content data;transmitting a plurality of content data to a reproduction apparatus based on the edited second list; anddisplaying a warning that the reproduction apparatus is not connected to the transmission apparatus if the reproduction apparatus is not connected to the transmission apparatus. 40. The computer readable medium according to claim 39, the method further comprising: comparing an identifier of said reproduction apparatus with an identifier stored in said transmission apparatus; andtransmitting said content data registered in said second list to said reproduction apparatus when said identifiers match each other. 41. The computer readable medium according to claim 39, the method further comprising: comparing said second list and a list of content data stored in said reproduction apparatus; andtransmitting content data which is registered in said second list and is not stored in said reproduction apparatus to said reproduction apparatus. 42. The computer readable medium according to claim 41, the method further comprising: deleting from said reproduction apparatus content data which is not registered in said second list and is stored in said reproduction apparatus. 43. The computer readable medium according to claim 39, the method further comprising: editing the second list based on a user input before the content data is transmitted. 44. The computer readable medium according to claim 43, the method further comprising: displaying the first list in a first window and said second list in a second window; anddragging and dropping the first list from said first window to said second window to edit the second list. 45. The computer readable medium according to claim 44, the method further comprising: displaying said first window at a left side of the display unit and said second window at a right side of the display unit. 46. The computer readable medium according to claim 43, the method further comprising: receiving said user input through a touch sensor. 47. The computer readable medium according to claim 39, wherein said second list is associated with said identifier of the reproduction apparatus. 48. The computer readable medium according to claim 40, the method further comprising: extracting one list from a plurality of lists as said second list; andassociating said second list with the same identifier as said identifier of said reproduction apparatus. 49. The computer readable medium according to claim 39, the method further comprising: transmitting said second list to said reproduction apparatus with the content data. 50. The computer readable medium according to claim 39, the method further comprising: omitting transmission to said reproduction apparatus of content data which is included in said second list. 51. The computer readable medium according to claim 39, the method further comprising: charging a battery of said reproduction apparatus in parallel with said transmitting. 52. The computer readable medium according to claim 39, the method further comprising: ripping content data from a CD. 53. The computer readable medium according to claim 39, wherein said content data is made by compression-encoding technology. 54. The computer readable medium according to claim 39, wherein said first list or said second list includes at least one of a title, an artist, a composer, a lyricist, a lyric, and a jacket image of content data. 55. The computer readable medium according to claim 54 the method further comprising: obtaining at least one of said title, said artist, said composer, said lyricist, said lyric, and said jacket image of content data from an external server via an internet. 56. The computer readable medium according to claim 39, wherein said transmitting is performed with a wireless transmission unit. 57. The computer readable medium according to claim 39, wherein said reproduction apparatus is portable. 58. A transmission system comprising: a reproduction apparatus including a reproducer configured to store and reproduce content data; anda transmission apparatus including, a communication unit configured to transmit to an external apparatus identification information of content data stored in the transmission apparatus and to receive additional information associated with the content data from the external apparatus;a searching unit configured to search content data from said transmission apparatus based on a comparison between the additional information received from the external apparatus and a search term;a display unit configured to display a first list indicating content data matching the search term;an editing unit configured to edit a second list of content data based on the first list, said second list registering a plurality of content data; anda transmission unit configured to transmit a plurality of content data to the reproduction apparatus based on the edited second list,wherein the display unit displays a warning that the reproduction apparatus is not connected to the transmission apparatus if the reproduction apparatus is not connected to the transmission apparatus. 59. The transmission apparatus according to claim 1, wherein the additional information includes lyrics of each content data. 60. The transmission apparatus according to claim 1, wherein the additional information includes a musical composer of each content data. 61. The transmission method according to claim 20, wherein the additional information includes lyrics of each content data. 62. The computer readable medium according to claim 39, wherein the additional information includes lyrics of each content data. 63. The transmission system according to claim 58, wherein the additional information includes lyrics of each content data.