Viz (also "viz.", with a period) and videlicet are adverbs used today as synonyms of "namely, precisely, that is to say". Videlicet is Latin for "one may see; clearly, evidently", while viz is a corrupted abbreviation of the former. They introduce a specification or a more detailed description of something stated before; often, as with a syntactical-descriptive colon, this is a list.[1] Though both forms survive in many modern languages, viz is far more common in English than videlicet. Viz is traditionally read aloud as "namely" or "to wit", In writing, it is now usually followed by an unnecessary period

"ps" may be regarded as a diagraph for /s/, as the "p" is silent.
A postscript (from post scriptum, a Latin expression meaning "after writing" and abbreviated P.S.) is a sentence, paragraph, or occasionally many paragraphs added, often hastily and incidentally, after the signature of a letter or (sometimes) the main body of an essay or book. In a book or essay, a more carefully-c ...more