What mobile variables are available for device signature analysis?

Question

I'm building a list of variables available on mobile devices, for device signature analysis. Here is what I've identified so far. Please help me fill out the list. Thanks!

General HTTP Variables

• IP Address
• Cookie
• User Agent

Smart Phone Variables

• Device ID
• Geolocation
• Device MAC Address

Javascript Variables

• Current Time
• Time Zone
• Screen Size
• Supported Fonts
• Preferred Language
• Installed Components
• Cookies Enabled

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The general pattern for getting variables might look something like this:

Answer 1

The Panopticlick project fingerprints browsers using a verity of techniques. This includes version numbers of the browser and all isntalled components (Flash, java, ect). The Project also looks at supported fonts, and prefered language, screen size and time zone.

Check out the results.