Computer representation of text eliminates all mechanical and physical limitations in any sufficiently advanced character encoding environment (such as Unicode), where spaces of various widths, styles, or language characteristics (different space characters) are indicated with unique code points. Spaces were not used to separate words in Latin until roughly 600–800 CE.  Moreover, many modern grammar guides are designed for quick reference and refer users to comprehensive style guides for additional matters of writing style.  For most countries, this remained the standard for published work until the 20th century. Until the 20th century, publishing houses and printers in many countries used additional space between sentences.  The few direct studies conducted since 2002 have produced inconclusive results as to which convention is more readable.. How about three? )", "The Scientific Case for Two Spaces After a Period", International Bureau of Weights and Measures, https://en.wikipedia.org/w/index.php?title=Space_(punctuation)&oldid=997187085, Articles with unsourced statements from May 2016, Articles with minor POV problems from May 2020, Creative Commons Attribution-ShareAlike License, One widened space, typically one-and-a-third to slightly less than twice as wide as a word space. It makes your work easier to read. Supporters of single spacing assert that familiarity with the current standard in books, magazines, and the Web enhances readability, that double spacing looks strange in text using proportional fonts, and that the "rivers" and "holes" caused by double spacing impair readability. A key example noted is the screenwriting industry's monospaced standard for screenplay manuscripts, Courier, 12-point font, although some works on screenwriting indicate that Courier is merely preferred—proportional fonts may be used. This spacing was sometimes used in typesetting before the 19th century. How Emacs recognizes the end of a sentence is controlled by the settings sentence-end-double-space and sentence-end. The relative size of the sentence spacing would vary depending on the size of the word spaces and the justification needs. Space is also filled with radiation (e.g.  Just as these machines revolutionized the mass production of text, the advent of the typewriter around the same time revolutionized the creation of personal and business documents. Beginning in the Classical Period (around the 5th century BC), scribes wrote in a style called scriptio continua in which all the words were run together without spaces.  The vi editor also follows this convention; thus, it is relatively easy to manipulate (jump over, copy, delete) whole sentences in both Emacs and vi. There are two Unicode characters dedicated for this: U+16EB ᛫ RUNIC SINGLE PUNCTUATION and U+16EC ᛬ RUNIC MULTIPLE PUNCTUATION. Checklist make -j4 test (UNIX), or vcbuild test (Windows) passes documentation is changed or added commit message follows commit guidelines A book that covers all the bases would need to be of considerable breadth and weight and anyone interested in such a resource is advised to consult the Chicago Manual of Style. Some academic and scientific institutions, however, like to see two spaces after a period, question mark, or exclamation mark so that the work is easier to review. It makes you glad scribes in the 10th century AD embraced the idea of spaces between words. Handwriting is also not covered. These works are important to writers since "virtually all professional editors work closely with one of them in editing a manuscript for publication".  The earliest Greek script also used interpuncts to divide words rather than spacing, although this practice was soon displaced by the scriptura continua.  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