a harmful dose of a chemical biological or radiological agent the information is sent first to the recommendation algorithm and then out to the module 39 s memory 115 the recommendation algorithm 114 evaluates the type of harmful agent to which the wearer has been exposed as well as the dose to which the wearer has been exposed and outputs a signal to the video screen 121 and speaker 122 that provides the wearer with instructions as to what actions he she should take for example depending on the specific threat the video and audio instructions could indicate if any commonly available substances can be used for decontamination if the agent should be scraped or washed from the skin or left alone if the agent is likely to accumulate near the ceiling or near the floor or a variety of other situation specific recommendations the recommendation algorithm 114 also takes into account information received from nearby personal modules 100 information received from the fixed communications center and location data from its internal gps receiver 120 to provide the wearer with directions for relocation to a less harmful environment in the case of a chemical release chemical threat data from nearby modules will allow the recommendation algorithm 114 to direct the wearer to a location with a lower density of the harmful chemical data stored in the module 39 s 100 ram 116 and permanent memory 117 is wirelessly sent by the rf transmitter 118 to nearby personal modules 100 and to the fixed communications center 202 the information can also be downloaded through the hardware output port 119 to a laptop or palmtop computer.