Abstract: There is provided a music distribution method capable of performing high-security music data distribution at high speed through the internet or other such network, wherein music data is divided into insufficient data and add-on data (step S101), the insufficient data, a restoration program and a communications program are written in a read-only fashion into a ROM section of a medium and the medium is distributed (steps S110-104), then the add-on data and such are distributed through the internet or the like (step S105) to be recorded into a RAM section of the medium and the music data is restored, producing a result that music may be regenerated on a terminal device.

Abstract: There is provided a method of connecting to a network such as the internet, having good operability for a user. When the user sets a medium into a personal computer, a central processing unit of the personal computer reads a booting program, an OS, various applications and a network connection program for connecting to the internet or the like which have been written into a ROM unit and RAM unit of the medium, then boots these and connects to the network such as the internet. Data downloaded from the connecting destination is written to the RAM unit of the medium and used locally.