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.
ArcGIS Desktop is the information authoring and usage tool for GIS professionals. It is scalable as three separate software products to meet the needs of many types of users. ArcView provides comprehensive mapping and analysis tools along with simple editing and geoprocessing.