The term “Mem.” is shorthand for memorandum, a note serving as a means to prompt one’s memory. Coincidentally enough, Wikitionary quotes Dracula as the sole example of the abbreviation. No wonder that it is marked as “now rare.” But while the shorthand might have fallen out of favor, the function of the memorandum has not. We just call it a “blog.”
—CJ Eller, in “Mem.”