12. The printing device according to claim 8 , further comprising a network device information storage unit configured to store network device information indicating whether each of the network devices in the network system holds image data as printer fonts or not, wherein: the query transmitting unit transmits the supply query only to network devices holding image data as printer fonts based on the network device information stored in the network device information storage unit.
8. A printing device to be connected to a network system, in which a plurality of network devices are connected together and the network devices are configured for sharing and handling image data in a particular format held by at least one of the network devices, the printer device being configured for communicating with the plurality of network devices, the printer device comprising: a print instruction receiving unit configured to receive print data containing font information from a network device in the network system; a query transmitting unit configured to transmit a supply query to the network devices in the plurality of network devices, the supply query inquiring whether or not each network device is capable of supplying an identical printer font which is identical to a printer font regarding the font information contained in the print data as image data in the particular format and inquiring whether or not each network device is capable of supplying a similar printer font which contains a same character code as, and is similar to, but not identical to, the printer font regarding the font information contained in the print data; a response receiving unit configured to receive an affirmative response transmitted from one or more of the network devices in response to the supply query, the affirmative response indicating that the supply of the identical printer font or the similar printer font regarding the supply query as image data in the particular format is possible; and a printing unit configured to print out the print data received by the print instruction receiving unit by use of the image data in the particular format held by at least one of the other network device which transmits the affirmative response, wherein: the supply query includes only a part of the font information, and when the identical printer font is not available, printer font data is created by reforming a shape by applying enhancement or changing a size of the similar printer font.