R-Tree (Spatial Indexing) – R-trees are tree data structures used for spatial access methods, i.e., for indexing multi-dimensional information such as for instance geographic coordinates, rectangles or polygons. The R-tree had been proposed by Antonin Guttman in 1984 and it has discovered use that is significant both theoretical and used contexts. Continue reading “RTOS – a abbreviation that is common real-time os. Raima Database Manager operates of many RTOS, like VxWorks, Integrity, Embedded Linux and QNX.”