Most drivers slide the shifter into “D” and never touch it again. P, R, and N explain themselves. Then there is that solitary ...

If you're a new driver -- or you're new to the world of automatic transmissions -- it's always helpful to brush up on what the letters on the shifter actually do. Alongside P, R, N, and D, plenty of ...

Almost every vehicle with an automatic transmission sold today uses letter codes to represent the different gear modes. Each mode is usually self-explanatory, such as “D” for Drive or “R” for Reverse.

Findings of a study on patterns of HIV transmission have shown the sources of new infections. This can aid prevention planning and focus efforts where they are most needed, reports Associate Editor ...