![]() Some lifeloggers carry around a GPS unit to log positional data, and trackers are being incorporated into more devices (e.g. We can get an idea of the potential for rich data collection by considering in detail the example of geodata. ![]() This could include photos taken by colleagues, friends and associates, events they have been to, music they listen to, and Web 2.0 style tags placed on content. It is likely that community generated information will become increasingly important. Information sources likely to be popular include email both sent and received, electronic calendar entries, music downloads and listening habits, Web browser information, including bookmarks, navigation history and downloads, file system information including document access, EXIF data from photographs, and biometric sensors, which may be used during medical treatment. The range of information that can be gathered is almost limitless, but in practice the information that is likely to be gathered will be relevant to the lifelogger’s main interests, and/or very cheap to gather. Lifelogging can be passive-one stores the by-products of the life one would have lived anyway-or active-one surrounds oneself with sensors and information capture tools to create as rich a picture of one’s life as possible. The logical end-point of the drive to store digital information is to store indiscriminately, a practice called lifelogging. This is a step-change in the relation between the technology of information storage and human memory, and under the title ‘Memories for Life’ (M4L) has been adopted by the United Kingdom Computing Research Committee (UKCRC) as a ‘grand challenge’ for computing research (O’Hara et al. ![]() Technology has nearly reached the stage when all information, interesting or otherwise, generated in a lifetime by a single person can be assembled and queried relatively efficiently, creating a need for Personal Information Management (PIM Jones 2008b). Information can be stored in enormous quantities, so people no longer have to be selective. Technology has always been important as a memory aid but twenty-first century computing power has provided the means for augmenting memory to a degree hardly dreamt of even ten years ago.
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