Communities of practice and technology: typical facilities   5

The broader market: a chart   8

Knowledge portals: the knowledge worker's desktop   11

Team work: online project spaces   15

Community management: website communities   18

On-line conversations: discussion groups   23

Synchronous interactions: on-line meeting spaces   28

On-line instruction: community-oriented e-learning spaces   32

Knowledge exchange: access to expertise   35

Knowledge repositories: documenting practice   39

Combining dimensions: convergence in the market   43