Sets of ranges typically are maintained using an associative memory and may be used to identify a matching range based on a query point or query range and to maintain sorted elements for use, such as in providing priority queue operations. The first and the second radiating units are disposed on the grounding unit. A substantially fully annular pull off biasing element is operably disposed for urging the non-rotatable gas bearing face surface axially away from the rotatable gas bearing face surface and circumscribed about the centerline axis. Also included is a method of providing power to downhole electronics. The data disc includes a first substrate structure bonded to a second substrate structure, with two curable material layers disposed on different sides of at least one of the two substrate structures, and at least one groove formed on a surface of one of the two curable material layers. A process, or phases of a process, using the features disclosed can be reversed and repeated to allow for an interactive development and modification of legacy systems.