This extension is one of the fifth-letter identifiers that appear after a dot and a company’s ticker symbol. It indicates that the stock differs from single issues of common or capital stock.

Math teacher Ben Orlin writes and draws the (aptly named) blog Math With Drawings and is the author of a new book, Math for ...

Some elements of that earlier vision remain: Math for English Majors talks about numbers as nouns, verbs as calculations, and ...

Note that Math Notes not only supports calculations written with Western Arabic numerals and common mathematical symbols, but also calculations using Arabic (Eastern & Western) and Devanagari numerals ...