N3RD Street is a nickname for a segment of North 3rd Street in Philadelphia, Pennsylvania, United States, between Market Street and Girard Avenue, and its surrounding community that is home to a concentration of "nerdy" companies and spaces; "N3RD" is a double entendre as both leet for "nerd" and reflecting the "N. 3rd St." of post…N3RD Street is a nickname for a segment of North 3rd Street in Philadelphia, Pennsylvania, United States, between Market Street and Girard Avenue, and its surrounding community that is home to a concentration of "nerdy" companies and spaces; "N3RD" is a double entendre as both leet for "nerd" and reflecting the "N. 3rd St." of postal addresses.