The symbol "L" is used for angular momentum primarily as a convention, with no formal justification behind the choice. One humorous suggestion is that it was selected because the letter "l" was already taken, leading to the use of "L" instead. Another participant pointed out that "L" relates to the term "Angular" in angular momentum. The discussion highlights the arbitrary nature of scientific notation, comparing it to other symbols used in physics. Ultimately, the choice of "L" remains a matter of convention rather than a deeply rooted rationale.