I learned all the Latin abbreviations in the 8th grade, and I use them as a shorthand for notes to myself. Cf. is one of my favorites. Or "et. al.", when I want to mean there is more than one person in that list.
You must've gone to Catholic school to learn Latin in 8th grade. Public schools just usually had Spanish, French, Italian, german, etc.
If you expect us to take you seriously, you must use those terms in a grammatically correct sentence, young man!
You probably did not learn all of the Latin abbreviations in 8th grade. I had five full years of studying Latin before my first trip to Rome. I always earned As in my classes and thought I knew a great deal, because I could pick up a volume of Ovid or Virgil and read it as well as books in the modern languages that I spoke. What I found was that I could not read the ancient inscriptions at all, other than recognizing a word or a name here and there. That was not only because of the lack of punctuation and spacing in the ancient carvings, but also because of all of the abbreviations carved in stone that I had never come across before on the printed page. Eventually, I caught on, but who would have thought that the letter “C” would be an abbreviation for the extremely common given name “Gaius”? Just one example.
