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.
ArcPad Photo layer. An ArcPad Photo layer (filename.APH) is a file format written in XML. An ArcPad Photo layer specifies how georeferenced photos are to be displayed in ArcPad. Before opening an existing Photo Layer in ArcPad, ensure that the layer file and photo files are in the same folder.