But other activities are growing faster, in particular "specialist communications".
He came up with the idea of distance learning and contacted Polycom, a specialist communications company, to see if they could help.
Sam Conniff is co-founder of Livity, a youth-specialist communications and engagement agency that works alongside young people everyday to co-create campaigns, content and communities that improve the lives of young people and the fortunes of its clients.
The Cordiant Communications Group in London said yesterday that it had agreed to acquire the Lighthouse Global Network in Chicago, an international network of specialist communications and marketing businesses, for $592 million in stock and debt.
The branding, healthcare and specialist communications division accounted for the final quarter of WPP revenue and reported a 6.2% year-on-year fall in revenue on a like-for-like basis.
They are already used in specialist communications and military applications but, despite high hopes and high-profile displays of the technology, they have never managed to hit the mainstream.
Since moving to the UK at the beginning of 2011, she has interned at the BBC World Services and worked at the Voice Newspaper as online journalist, as well as working as account executive at global tolerance, a specialist communications agency.
But Michele Tolela Myers, a specialist in communications who became president of Sarah Lawrence in 1998, is undaunted.
Mr. Shah, known to be a specialist in communications technology, may have been aware of the difficulties in tracing VoIP.
Tracey Barrett is founding director of BlueSky PR, the specialist boutique communications consultancy for the HR and education sectors.
