In England, Wales and Northern Ireland, the Diploma in Digital Applications (DiDA) is an optional information and communication technology (ICT) course, usually studied by Key Stage 4 or equivalent school students (aged 14-16). DiDA was introduced in 2005 (after a pilot starting in 2004) as a creation of the Edexcel examination board. DiDA is notable in that it consists entirely of coursework, completed on-computer; all work relating to the DiDA course is created, stored, assessed and moderated digitally. It was introduced as a replacement to plug the gap in ICT education as GNVQs were withdrawn.