A radiation source module comprising a support member, a radiation source assembly connected to the support member and a seal disposed on a first surface of the module, the seal operable to provide a substantially fluid tight seal between the first surface and a second surface which is adjacent to the first surface. The plurality of service processors and the plurality of markup language parsers can be registered with one or more session managers. Features provided to the users by remaining computer systems depends on the relationships between the users. Upon restoration of power to the memory array, data may or may not need to be marked as unusable depending upon which of the two power planes supporting arrays to the memory array are located.