COMPUTER SYSTEMS RESEARCH
Elements of Technical Writing
2005-2006

  • Omit internal and terminal punctuation in abbreviations 
      R.S.V.P   should be RSVP
  U.F.O   should be UFO
    An exception to this rule: The final period is used when the abbreviation spells out a single word: 
      no. (number)
  fig. (figure)
    But if the word is a unit of measure, than omit the final period 
    
  lb (pound)
  yd (yard)
  mi (mile)