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    | n | Data
    management 
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    |  | 
   
    |  | – | management
    of buffered data and copies of data 
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    |  | 
   
    |  | – | request
    for updates, validity of data 
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    |  | 
   
    |  | – | detection
    of changes in data 
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    |  | 
   
    | n | Conflict
    solving 
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    |  | 
   
    |  | – | application
    specific or general 
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    |  | 
   
    |  | – | errors 
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    |  | 
   
    | n | Several
    experimental systems exist 
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    |  | 
   
    |  | – | Coda
    (Carnegie Mellon University), Little Work (University of 
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    |  | Michigan),
    Ficus (UCLA) etc. 
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    |  | 
   
    | n | Many
    systems use ideas from distributed file systems such 
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    |  | as,
    e.g.,  AFS (Andrew File System) 
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