Computing

Monolithic computing: computer is alone and only uses its own resources.
- Multiple users allowed via timesharing.
Distributed computing: multiple computers, each with its own CPU and memory, connected via a network.
- Cooperative computing: a form of distributed computing where a program is split among computers. (SETI, distributed.net).
- Grid Computing: buzzword duJour.
  "Grid computing can be differentiated from almost all distributed computing paradigms by this defining characteristic: The essence of grid computing lies in the efficient and optimal utilization of a wide range of heterogeneous, loosely coupled resources in an organization tied to sophisticated workload management capabilities or information virtualization."
  also, see the Globus toolkit.
Parallel computing: more than one CPU executes the same program.