Virtual worlds are made up of grids -> eg OpenSim virtual world, Second Life virtual world
A grid hosts 1 virtual world -> eg the PLANE grid
Grids can have one or more estates, an estate is a group of regions -> eg the PLANE estate
A region is a 256m x 256m island of land -> eg the PLANE Bootcamp, PLANE Labs regions
A region can be sub divided into parcels of land -> the smallest being 4m x 4m.
The Educational Technologist 