A content delivery network includes a plurality of cache servers. In one illustrative embodiment, the eContract may comprise information pertaining to: descriptions of business transactions in IT terms; financial implications of business transaction service levels; and reporting to be done in business terms. In addition, there are provided transmission mechanism configured to operate the locking members in conjunction with a movement of the switching member. Upon an exerted force, the seat base swings about a pivot axis defined by its pivotal coupling to the side frames. The light source also preferably includes a plurality of heat pipes having heat radiating fins on the heat radiating portions thereof. The limit switch includes a cover with respective upper and lower cover portions which are held together by click-lock tabs and grooves.