Demoed code mobility and dynamic composition. Not one big MS Word but download spell checker at run time. Download many services and their management. Jini scales in several ways, jury is still out. Jini contains JATlite and Aglet infrastructure already.
Agents specialize composition, mobility and other classes.
These are mobile objects w itinerary. Mobile code that is intelligent is this defn of agent. The code contains an itinerary and sends self to another site. Agents run in an Agent Place which is context where agents run and provides security, runs at some place that itself is downloaded. Dynamism of agents and places at run time.