TeX concentrated on detailed layout of text and font descriptions to typeset mathematical books. This allows the typesetter to distinguish sentence endings from abbreviations and to typeset them differently. Sentence spacing is the space between sentences in typeset text. This allowed the text to be typeset to be supplied over a telegraph line (TeleTypeSetter). The first Odia printing typeset was cast in 1836 by Christian missionaries. LaTeX has become the de facto standard to typeset mathematical expression in scientific documents. Its primary purpose is to typeset mathematical expressions. Today, limericks are invariably typeset as five lines. For the first three editions, most are typeset as, respectively, two, five, and three lines. The main purpose of Texinfo is to provide a way to easily typeset software manuals. There has been some controversy regarding the proper amount of sentence spacing in typeset material. The virgule may be thinner than a standard slash when typeset. It is presented below as originally typeset. This is the easiest to typeset on a computer, including in HTML.