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.
A fundamental goal of ArcGIS is to work with your file-based data and DBMS data as well as with GIS web services from ArcIMS, ArcGIS Server, and others such as OGC WMS. ArcGIS lets you work with a large number of data sources. These are listed in the tables below. Data formats supported in ArcGIS (ArcView, ArcEditor, and ArcInfo)