Distinct molecules called agglutinogens (a type of antigen) are attached to the surface of red blood cells. There are two different types of agglutinogens, type A and type B. Each type has different properties.
MDB: Geodatabase. The geodatabase is a collection of geographic datasets of various types, with the most basic types being vector, raster, and tabular data. There are three types of geodatabases: file, personal, and ArcSDE. Geodatabases are the native data format for ESRI's ArcGIS.
The default x,y resolution for feature classes created in ArcGIS 9.2 and later releases is 0.0001 meter or its equivalent in the units of the dataset's coordinate system. For example, if a feature class is stored in state plane feet, the default precision will be 0.0003281 foot (0.003937 inch).