  The Boolean algebra of regular closed sets is prominent in topology,
particularly as a dual for the Stone-Cech compactification. This algebra is
also central for the theory of geometric computation, as a representation for
combinatorial operations on geometric sets. However, the issue of computational
approximation introduces unresolved subtleties that do not occur within "pure"
topology. One major effort towards reconciling this mathematical theory with
computational practice is our ongoing I-TANGO project. The acronym I-TANGO is
an abbreviation for "Intersections - Topology, Accuracy and Numerics for
Geometric Objects". The long-range goals and initial progress of the I-TANGO
team in development of computational topology are presented.
