Steve Jobs

Steve Jobs was a human entrepreneur who created the iPad. According to Seb, Jobs' consciousness was uploaded to the Nethersphere after his death. (TV: Dark Water)

When Helen Sinclair, a human from 1963, insisted that it was impossible to record sound onto a (stone) tablet, the Eighth Doctor jokingly cited Jobs as evidence that it could in fact be done, to which Sinclair asked "who?". (AUDIO: The Red Lady)

Graham O'Brien identified himself under the false name of Steve Jobs to a police officer in Alabama in 1955. (TV: Rosa)

Behind the scenes
In the real world, Jobs' company, Apple Inc., also created the iPod, iPhone and Macintosh computers. However, this connection has not been made in-universe yet.