The study included measurements of electromagnetic radiation emitted by MACINTOSH PC placed in public schools, functional state examination of schoolchildren sitting in rows in front of PCs. Electromagnetic radiation emitted by PCs appeared to harm higher nervous activity of the schoolchildren. With consideration of the studies conducted the recommendation is not to set workplaces in rows. The workplaces could be set perimetrically, with at least 1.0 m between the lateral borders of neighboring monitors. Angle-wise set workplaces should stay at least 2.0 m apart.