Teleworking is also often described or equated with ICT-based mobile work. ICTs contribute to the organisation of work and the working environment by offering them flexibility in time and time and by enabling them to be permanently connectivity. Eurofound and the ILO define ICT-based mobile work as a working agreement characterised by work from more than one location made possible by ICTs. For example, based on employee surveys, Statistics Netherlands (CBS) showed that teleworkers were generally well-trained, were relatively often in a supervisory position and worked for long weeks of more than 40 hours . In a large recent Dutch study , based on four editions of the National Working Conditions Survey (NWCS) with a representative response of more than 22,000 workers per year , teleworkers were relatively often highly educated, men, married or living with children and lived relatively far from their work compared to non-teleworkers. In addition, it turned out that teleworkers were relatively often placed in a surveillance station. Teleworkers worked more overtime and (naturally) often worked with a computer.