A correspondent refers me to The Cambridge Encyclopedia of the English Language, from which he quotes: 'the influence of US films and television has led to a considerable passive understanding of much American English vocabulary in Britain, and some of this has turned into active use, especially among younger people.' He asks: 'What about the effect of information technology? Do there still exist differences between American and British English in terms of using IT terminology?'
It's an interesting question, and on the whole I see very little sign of differences between British and American English in internet terminology (other than the occasional spelling difference). I suppose this is because the internet by its nature is a levelling medium: a new usage on one side of the Atlantic or the other is quickly made available to all parts of the internet world, and its point of origination becomes unimportant. It is in the nature of scientific terminology to be general, in any case.
The terminological differences I've collected over the years are more related to specific schools of thought (such as the slang used by different IT labs or different software companies) rather than to anything specifically regional. Indeed, it would be impossible to tell whether a new term in, say, contextual advertising, arose from the British branch of Yahoo! or the US branch, or any other. (I am reminded of the way scribal conventions spread in Anglo-Saxon England: scholars now think that several forms previously thought of as dialect features can be traced back to individual monasteries rather than to geographical regions.)
My correspondent also asks for some research references on this point. I don't know of any. When I was researching my Glossary of Textspeak and Netspeak (2004), I went into dozens of sites looking for regional uses, and found nothing, apart from the occasional slang item (which related to a specific institution, as mentioned above).
So I'd be interested to hear of any candidates for US vs US differences, as far as IT terminology goes.