in everyday experience" (p.8). Acting in classrooms as ethnographers, we observed evocative objects that are rooted in specific practices and agglutinate mental representations and values. This presentation explores how school children, their teacher and the researcher's team together transformed a classroom into a digital world, in which evocative digital objects replaced other evocative material and many other traditional tools. Mobile Memento's: Expanded Archives, Fragmented Access , Imar de Vries Personal wireless communication devices such as mobile telephones are regularly presented as enabling technologies with emancipating powers, giving instant and ubiquitous access to people and information resources which would not have been as easily -- if at all -- available previously. The emphasis is often on reaching harmony and agreement through the exchange of knowledge, and on making progress through the fusion of ideas. What easily becomes 'depresented' in such imagery, however, is that, while an enormous amount of visual, textual and aural data is captured by millions of mobile device users every day, only a small fragment of that data is made available for query on a large scale. My aim in this paper will be to conceptualize this fragmented archive of mobile memento's as a phenomenon that prompts us to reconsider the more traditional meanings of storage and transmission, and to investigate the ways in which new forms of data disclosure (such as geotagging, geocaching and mobile-augmented reality) are to be understood in relation to popular ideas about omniscience and ever-present data clouds. The Digitization of Memory: Blessing or