Nielsen Norman Group is a leading UX research and consulting firm. Founded in 1998 by Jakob Nielsen (inventor of discount usability testing and the 10 usability heuristics) and Don Norman (author of The Design of Everyday Things and coiner of the term 'user experience'), NN/g's mission is to improve the everyday experience of using technology and provide organizations worldwide with tangible, reliable advice in user experience. Since 1998, NN/g researchers have studied thousands of interfaces and have unearthed and published groundbreaking insights about how people use digital products. They provide consultancy services for hundreds of companies spanning virtually every sector. Since 2002, hundreds of thousands of UX practitioners from all over the world have been trained by NN/g as part of the UX certification program and through NN/g's UX Conference.