Groupware collaboration solution?

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M-++\Alan Dayley
|.||MDerek Neighbors
M\||Austin Godber
|M||Craig White
|.|MCraig White
|.|M\Alan Dayley
|.M||Carl Parrish
M..||Austin Godber
...|Mdavid uhlman
...|MCarl Parrish
...MCraig White
MAlan Dayley
MDerek Neighbors