Abstract: A method of mapping health data acquired by a measurement device (101a-c) which is useable by a plurality of users to an appropriate health record is described. The method involves receiving (201) new health data acquired by the measurement device (101a-c); identifying (206; 209) the user to which the new health data relates; and mapping (207) the health data to at least one health record for said user; wherein the step of identifying the user to which the new health data relates comprises: identifying at least one item of context data associated with said new health data; and determining (205, 208) whether said context data corresponds to a known context for at least one user. The context data is data regarding the circumstances in which the new health data was acquired and/or the relationship of the new health data to other measurement data associated with a particular user.