In December 2012, the BBC completed a digitisation exercise, scanning the listings of all BBC programmes from an entire run of about 4,500 copies of the Radio Times magazine from the first, 1923, issue to 2009 (later listings already being held electronically), the "BBC Genome project", with a view to creating an online database of its programme output.[141] An earlier ten months of listings are to be obtained from other sources.[141] They identified around five million programmes, involving 8.5 million actors, presenters, writers and technical staff.[141] The Genome project was opened to public access on 15 October 2014, with corrections to OCR errors and changes to advertised schedules being crowdsourced.[142]