In biology or medicine, a<unk>  is an identification<unk>  which overcomes the problem of the more traditional single-access<unk> s (dichotomous or polytomous identification<unk> s) of requiring a fixed sequence of identification steps. A<unk>  enables the user to freely choose the characteristics that are convenient to evaluate for the item to be identified. Although good single-access<unk> s will try to start with characters that are reliable, convenient to observe and generally available throughout most of the year, it is often impossible to achieve this for all taxa in a<unk> . A<unk>  lets the user adapt the<unk>  to the particular organism that is being identified and to the circumstances of identification (e.g. field or laboratory).<unk> s may be printed in various way (tabular, matrix, formula style, etc.) but are more commonly used as computer-aided, interactive<unk> s.
Multi-access key
Community first responder
Source document
Outline of medicine
Outline of public health
Death Certificate
NHS Resolution
CBRNE Enhanced Response Force Package