Open Source Software and Electronic Markets - Preface to the Special Section

A hygienic toilet seat assembly where the toilet seat has the shape of a key ring with the overlapping placed at the rear region of the seat. A flat tubular protection cover is moved over the seat to protect it from being soiled and to protect the toilet user from contamination. Due to the overlapping configuration, the whole surface of the seat is covered by the protection tube. The seat can be lifted like conventional seats.