What is the abbreviation for East?

The abbreviation for "East" is represented by the letter "E." This is a widely recognized standard in navigational and geographical context, where cardinal directions are typically abbreviated. In various mapping and transportation systems, "N" stands for North, "S" for South, "W" for West, and "E" for East.

Using a single letter for each direction allows for quick and clear communication, especially in transit operations like those of SEPTA, where conveying information efficiently is crucial. The other options do not correspond to the abbreviation for East, as they are associated with different names or terms that do not relate to cardinal directions.