User Agent

BlackBerry 9900; en) AppleWebKit/534.11+ (KHTML, like Gecko) Version/7.1.0.746 Mobile Safari/534.11+

This user agent belongs to BlackBerry. Research In Motion Limited developed this Browser. This Browser run on RIM OS and it renders web contents with WebKit on Blackberry.

Browser - BlackBerry

BlackBerry

Version7.1 @ 32 bit
DeveloperResearch In Motion Limited
ParentBlackBerry 7.1
Device TypeMobile Phone

Act as 

Crawler No
Fake No
Anonymized No

Device - BlackBerry

BrandBlackBerry
Model9900
Platform blackberry 7.1 (32 bit) by Research In Motion Limited
Mobile Yes
Tablet No

Capabilities

Rendering EngineWebKit by Apple Inc (For Google Chrome, iOS (including both mobile Safari, WebViews within third-party apps, and web clips), Safari, Arora, Midori, OmniWeb, Shiira, iCab since version 4, Web, SRWare Iron, Rekonq, and in Maxthon 3.)
Pointing-
Javascript Yes
CSS Yes Version: 3
Cookies Yes
Tables Yes
Frames Yes
IFrames Yes
Background Sounds No
Java Applets Yes
VB Script No
Activex No