However, in the SNA ancillary refers to basic, routine services to support production activities that are required by all enterprises. When they are provided in-house, they are called ancillary activities, e.g. cleaning premises, running the staff payroll or providing the information technology infrastructure for the enterprise, etc. Health care classes involve final consumption and include all cost components, e.g. e-medicine is expected to be included in the resources accounted for. E-medicine is the use, in the health system, of digital data - transmitted, stored and retrieved electronically - in support of health care, both at the local site and at a distance.