Sub lnks of # 1

I was wondering if any body knows why or how you get the sub-links of a number 1 company in Google. i.e When you type Panasonic into Google, you will get, as well as the main page:

Panasonic UK - Panasonic UK - DVD Recorders, SD Memory, Plasma ...

Panasonic UK - Electronics manufacturer of DVD Recorders, DVD-RAM, Televisions, Plasma, LCD, Home cinema, Digital Cameras, Camcorders, SD Memory cards, ...
Panasonic UK - Panasonic UK - DVD Recorders, SD Memory, Plasma Screens, Toughbooks, Photocopiers, Televisions and Digital Cameras - 14k - Cached - Similar pages - Note this

Product Range Dealer Locator
Customer Support Next Product
New Products Site Map
Contact Us Technology

Any ideas how you get these extra links when you hold a number one position?

Cheers,

Yes, just type into google

site:sitename.com and search
and you will find all the indexed sites of this page from google.

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