An insulating glazing is described, including a first pane, a second pane, and a circumferential spacer between the first and second panes. The input voltage is applied to a degenerated transistor which forms part of the input buffer. The shirt has a one pocket adapted to hold a writing utensil and incorporates a security badge attachment loop. The hierarchical data structure may be processed to determine which of the nodes the user is authorized to perform operations for.