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.
Return Data Format. Your return data format will match the format of the data you uploaded for processing, appended with the NCOA fields. For example, if you upload a XLS file, your return data will be XLS; if you upload a tab-delimited format (preferred), your return data will be tab-delimited.