Basic building blocks of the English language, the good old ABCs, are frequently used singly to convey an entire word or concept. More than just popular acronyms or initialisms, single-letter words help communicate simply and succinctly complex processes, well-known organizations, familiar brand names, legal designations, and physical objects from large to small.
Chism, Stephen J. and Cantrell, Andrea
Word Ways: Vol. 30
, Article 23.
Available at: http://digitalcommons.butler.edu/wordways/vol30/iss2/23