Abstract: A system and method for implementing a computer-aided event history calendar includes computer component systems for storing, processing, displaying, and entering the event history calendar data. Recall of retrospective, autobiographical use of consumer products or substance exposure is facilitated in the context of an event history calendar whereby a respondent is asked questions concerning the occurrence and timing of various important life events throughout the respondent's life. Questions are asked regarding the respondent's usage of particular consumer products or exposures to substances as well as the sources of those products or substances. To assist the respondent in recalling the specific sources of consumer products or substances, source-identifying features of various possible consumer products the respondent may have used or substances the respondent may have been exposed to are displayed to the user.