Tier-I

Approximately twenty years after the doors of NY-107 were sealed, members of the Science & Medical Wing invented the first Personal Sensory Computer (PSC). Though the design and size of the PSC has changed dramatically since then (especially since the original prototype consumed all the test subject's organic matter in 8.3 seconds), the concept and uses are the same.
At the age of eighteen, after education is complete and apprenticeship has begun, each citizen of NY-107 is injected with nanobots and has nodes implanted at the base of the skull and in both palms. The nodes act as playforms upon which the nanobots construct the organic circuitry and connections to the central nervous system. [Note: It is highly recommended by the Chief Medical Officer to ingest twice the daily percentage of vitamins and minerals during this stage, usually lasting one to three days.] This circuitry does not truly enhance the host's physical abilities or mental prowess (initially; upgrades can be purchased and installed/ingested/injected for this purpose at the loss to the host's humanity), it is merely a replacement for bulky or cumbersome handheld computer units.
The unit is powered by the host's own bio-electric field and uses a portion of the host's grey matter for memory storage and processing. It can translate electric al impulses sent to the brain (touch, sound, smell, and occassionally taste and sight) to determine flaws in solid materials, identify hidden or unknown obects, or problems with machinery. The processor functions as a calculator and can more easily summon host memories.
Propbably the most beneficial function to the host is the Electro-Magnetic Mapping (EMM). Using electromagnetic fields generated by all living creatures, the PSC can theoretically map terrains from fifty (heavy mountainous) to five thousand (plains) feet in any direction. Since the PSC was developed in a clean facility, it is unknown what effect weather might have on this function. Maps are stored and updated automatically in host memory. Approximately nine to ten seconds (three game rounds) of uninterrupted concentration is required to recall maps. Maps can be transferred to other hosts via grasping hands, palm to wrist, for approximately five to six seconds (two game rounds).

Tier-II

Interface: Once the PSC is upgraded to Tier-II, the host can access the visual interface. By holding both hands out, palms up, at half an arm length away from the body, and concentrating for approximately three seconds (one game round), the host can project a holographic interface, visible to anyone with a PSC. Full capabilities have not yet been tested, although map-terrain visual overlays are accessible, complete with movable waypoint function.

Tier-III

Scientists of NY-107 are rumored to be working on a Tier-III upgrade, although no prototype has yet been built or tested.