Abstract: A head-mounted device may have a head-mounted housing containing rear-facing displays that display images for a user when the head-mounted housing is worn by the user. The head-mounted device may have an adjustable-tension headband coupled between first and second sides of the head-mounted housing. The adjustable-tension headband may be operable in a stretch fabric tensioned mode in which tension for the headband is provided by stretching a length of stretchable fabric in the headband and may be operable in a cable-tensioned mode in which tension for the headband is applied by a tensioned cable. A knob or other adjustable cable tensioning mechanism may be used to adjust cable tension.

Abstract: A rain water collection system which collects rain water from rain drains from the building and the vehicle parking area. Rain water from both sources are commingled in a receiving reservoir. When the reservoir, buried underground, is full, excess rain water is discharge through an overflow pipe into a percolation system which leaches the excess rain water into the soil. A pressure system draws the rain water from the reservoir and provides irrigation to the site.