There is provided a dual-boot control method for a personal computer capable of being connected with the Internet by way of a router in an information processor connected with a dedicated network. For each step liquid is pumped from a separate tank to spray heads for rinsing a filter at a cleaning station and effluent with entrained contaminants is collected for transfer away from the cleaning station. The different views provide the user with both logical and graphical representations of the properties being monitored and allows the user to link between a logical and physical view of the system. At least two integrally formed discrete engagement members are positioned at the second end of the body with a centrally positioned gap between the at least two engagement members. The cover member is pivotably supported by a bearing portion provided on the wall portion, so as to pivot between a first position in which the connector unit is exposed so as to allow an operator to grasp the cover member, and a second position in which the connector unit is concealed. Position equalization control is further provided to maintain a position of the object along an axis that is orthogonal to the coarse and fine suspension axis.