More than just a communication system: diversity in the use of electronic mail
CSCW '88 Proceedings of the 1988 ACM conference on Computer-supported cooperative work
Concurrency control in groupware systems
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Email overload: exploring personal information management of email
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
ACM Transactions on Computer-Human Interaction (TOCHI)
Presto: an experimental architecture for fluid interactive document spaces
ACM Transactions on Computer-Human Interaction (TOCHI)
Informing the design of an information management system with iterative fieldwork
DIS '00 Proceedings of the 3rd conference on Designing interactive systems: processes, practices, methods, and techniques
A generic late-join service for distributed interactive media
MULTIMEDIA '00 Proceedings of the eighth ACM international conference on Multimedia
How can cooperative work tools support dynamic group process? bridging the specificity frontier
CSCW '00 Proceedings of the 2000 ACM conference on Computer supported cooperative work
Time, clocks, and the ordering of events in a distributed system
Communications of the ACM
Enabling conferencing applications on the internet using an overlay muilticast architecture
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
Consistency control for distributed interactive media
MULTIMEDIA '01 Proceedings of the ninth ACM international conference on Multimedia
Taking email to task: the design and evaluation of a task management centered email tool
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
UMEA: translating interaction histories into project contexts
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
One-hundred days in an activity-centric collaboration environment based on shared objects
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Explorations in an activity-centric collaboration environment
CHI '04 Extended Abstracts on Human Factors in Computing Systems
DIS '04 Proceedings of the 5th conference on Designing interactive systems: processes, practices, methods, and techniques
ACM SIGGROUP Bulletin
Computer Supported Cooperative Work
Patterns of media use in an activity-centric collaborative environment
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Plugging presence awareness into Mozilla thunderbird
IMSA'06 Proceedings of the 24th IASTED international conference on Internet and multimedia systems and applications
FeedMe: a collaborative alert filtering system
CSCW '06 Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work
Activity explorer: activity-centric collaboration from research to product
IBM Systems Journal
Supporting collaborative task management in e-mail
Human-Computer Interaction
Proceedings of the ACM 2009 international conference on Supporting group work
Extracting knowledge about users' activities from raw workstation contents
AAAI'06 Proceedings of the 21st national conference on Artificial intelligence - Volume 1
DOLCLAN: middleware support for peer-to-peer distributed shared objects
DAIS'07 Proceedings of the 7th IFIP WG 6.1 international conference on Distributed applications and interoperable systems
Integrating synchronous and asynchronous interactions in groupware applications
CRIWG'05 Proceedings of the 11th international conference on Groupware: design, Implementation, and Use
CRIWG'06 Proceedings of the 12th international conference on Groupware: design, implementation, and use
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We describe a new collaborative technology that is mid-way between the informality of email and the formality of shared workspaces. Email and other ad hoc collaboration systems are typically lightweight and flexible, but build up an unmanageable clutter of copied objects. At the other extreme, shared workspaces provide formal, structured collaboration, but are too heavyweight for users to set up. To bridge this gap between the ad hoc and formal, this paper introduces the notion of "object-centric sharing", where users collaborate in a lightweight manner but aggregate and organize different types of shared artifacts into semi-structured activities with dynamic membership, hierarchical object relationships, as well as real-time and asynchronous collaboration. We present a working prototype implemented with a replicated peer-to-peer architecture, which we describe in detail, and demonstrate its performance in synchronous and asynchronous modes.