CAR refers to the Conditional Auto-regressive models, which is used in spatial statistics.
1) CAR refers to Conditional Auto-Regressive models, which are used in spatial statistics. A discussion of spatial models appears in the thread at http://stats.stackexchange.com/questions/277/spatial-statistics-models-car-vs-sar.
2) car
is also an R
package. The name stands for Companion to Applied Regression. It contains various datasets and visualisation functions useful for regression analysis. For a detailed description see the CAR documentation.