"Father of the internet" Vint Cerf has called on IT professionals in the UK to volunteer.
He recorded a video for iT4Communities asking people with IT skills to help at charities in need of their expertise.
Google's vice-president and chief internet evangelist is famous for co-designing the basic architecture of the internet with Robert Kahn.
"It is very important for the charities of the world, and especially here in the UK, to have access to information technology assistance from experts like yourselves," he said.
"Not all of them have that capability, and in some sense they live on the wrong side of the digital divide. You have an opportunity to help."
iT4Communities matches IT volunteers with charities who need their help. John Davies, iT4Communities programme manager, said, "Vint's message proves just how far reaching and important the work of iT4Communities and its volunteers is. More IT professionals on board means more and more charities will get the IT help they badly need to serve their front line."