The Shore Object Store currently runs on Unix systems. It is the database engine used by Paradise, a parallel GIS. I have ported Shore to Windows NT. The intent of this effort is to create an object store which is natively ported to both Unix and Windows NT. The challenge is to provide necessary abstractions to allow use of native features of the underlying systems. At the same time, it is desired to not introduce system dependencies into the "generic" portions of the system; they are complex enough in their own right.