A power amplifier is configured to generate impedances at harmonic frequencies such that the power amplifier operates in a class C mode in a low output amplitude range and in a class F or inverse F mode in a high output amplitude range. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. A specimen holder is provided to hold a specimen in the path of the electron beam. In an alternative embodiment of the present invention, the branch prediction unit is further operable to pre-fetch instructions from a memory hierarchy into a local instruction memory device in response to the branch prediction unit pre-decoding a first instruction of a branch operation. Thereafter the fingers are curled until the mating hook and loop member 30 are engaged thereby locking the gloves 22 onto the article to be held. The second display content can include display content that borders the first display content at the boundary.