M. L. Wang

The provided text explains the concept of a pen name, also known as a nom de plume, which is a pseudonym adopted by an author. These names serve multiple purposes, such as making an author's name more memorable, concealing their gender, separating different bodies of work, or protecting them from potential repercussions for their writing. Authors might also use pen names for marketing strategies or aesthetic choices related to their publications. The extent to which an author's true identity is known can vary, ranging from being privy only to the publisher to becoming widely recognized by the public.

The extract lists M. L. Wang under the letter 'W' as an author who utilizes a pen name. However, the specific reasons behind M. L. Wang's adoption of this pseudonym, the author's actual identity, or any particular works associated with this name are not detailed in the provided information. The text focuses on the general function and rationale behind using pen names in authorship, rather than providing biographical details about specific authors who employ them.