ALPBACH, Austria (Reuters) - Europe needs to invest close to $800 billion in its digital infrastructure to catch up with the United States and China, the European Union commissioner responsible for the issue said on Thursday.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=SxYsbCAX9Oo:1OpPbqU5icU:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=SxYsbCAX9Oo:1OpPbqU5icU:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=SxYsbCAX9Oo:1OpPbqU5icU:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=SxYsbCAX9Oo:1OpPbqU5icU:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=SxYsbCAX9Oo:1OpPbqU5icU:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/SxYsbCAX9Oo" height="1" width="1" alt="" />