functions. Backup copies The Doctor's program required a custom-built photonic processor, and Starfleet outfitted Voyager with only two. This hardware itself also could not be replicated, hence the Doctor could not be easily backed up, restored, or copied. Voyager'''s computers could not help run his photonic program, and could not contain a usable backup of its image. The Doctor's entire program used 50 million gigaquads ("Lifesigns" and "The Swarm" mention these limitations). The episode "Living Witness" depicts a future Delta Quadrant civilization building a museum around Voyager artifacts, including its redundant EMH photonic processor. Name A recurring theme in the Doctor's life was his lack of a proper name. Starfleet did not assign a name to him, and initially, the Doctor claimed that he did not want one until the episode "Eye of the Needle", when he asks Kes to give him a name. He later adopted such names as "Schweitzer" (after Albert Schweitzer); "Shmullus" (in "Lifesigns" by Vidiian patient Dr. Denara Pel); "Van Gogh"; "Kenneth"; "Jones"; and several others. His friends suggest the famous historical Earth doctors "Galen" and "Spock." The captioned dialog of early episodes, and early promotional material for the series premiere, referred to him as 'Dr. Zimmerman', after his creator, Lewis Zimmerman. The Doctor is ultimately referred to as simply "The Doctor" and addressed as "Doctor" or "Doc", which he answers to without concern, and the issue of the Doctor's name virtually disappears over the course of the series. However, in the series finale, in an alternate future timeline the Doctor has finally chosen the name "Joe" after his new wife's grandfather, and Picardo's own father. (Tom Paris remarked in "Endgame" that "it took you 33 years to come up with "Joe"?"). Characteristics Before the arrival of the mobile emitter, The Doctor's holo-program was confined to sickbay, holodecks, and other areas equipped with holographic systems. Depending on the availability of suitable holographic patterns and the capacity of his pattern buffers, The Doctor can alter his appearance. This was illustrated especially in the episode "Renaissance Man." The Doctor is also able to download his program and personality subroutines into a humanoid with Borg implants, indirectly "possessing" that individual and gaining control over its "host" body. Such was the case when he was forced to hide within the body of Seven of Nine in "Body and Soul". Emergency Medical Hologram The EMH is a holographic computer program designed