Which letter is known for having a counter?

The letter that is known for having a counter is widely understood to be the letter "B." A counter is defined as the enclosed space within a letterform. In the case of "B," its two rounded sections or lobes create distinct counters. This feature is particularly significant in typography, where understanding the anatomy of letters helps in design decisions and the readability of typefaces.

Other letters like "A," "C," and "D" do not have the same count of enclosed spaces or counters that defines the overall form of "B." For instance, "A" has a triangular space but does not have a fully enclosed counter like "B." "C" and "D" also feature open forms without closed counters, making them distinctly different from "B." Understanding counters is crucial for graphic designers in creating visually balanced and fluently readable text.