<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>7992</REFNUM><AUTHORS><AUTHOR>Brown,B.</AUTHOR><AUTHOR>Chalmers,M.</AUTHOR><AUTHOR>Bell,M.</AUTHOR><AUTHOR>MacColl,I.</AUTHOR><AUTHOR>Rudman,P.</AUTHOR></AUTHORS><YEAR>2005</YEAR><TITLE>Sharing the square: collaborative leisure in the city streets</TITLE><PLACE_PUBLISHED>European Conf. Computer Supported Collaborative Work </PLACE_PUBLISHED><PUBLISHER>Kluwer</PUBLISHER><LABEL>Brown:2005:7992</LABEL><KEYWORDS><KEYWORD>Equator</KEYWORD></KEYWORDS<ABSTRACT> Sharing events with others is an important part of many enjoyable experiences. While most existing co- presence systems focus on work tasks, in this paper we describe a lightweight mobile system designed for sharing leisure. This system allows city visitors to share their experiences with others both far and near, through tablet computers that share photographs, voice and location. A collaborative filtering algorithm uses historical data of previous visits to recommend photos, web pages and places to visitors, bringing together online media with the city’s streets. In an extensive user trial we explored how these resources were used to collaborate around physical places. The trial demonstrates the value of technological support for sociability - enjoyable shared social experiences. We also discuss support for collaborative photography and the role history can play in collaborative systems. </ABSTRACT><NOTES>To appear</NOTES></RECORD></RECORDS></XML>