Frt—for Freight.
No—for Number.
Eng—for Engine.
Sec—for Section.
Opr—for Operator.
9—to clear the line for Train Orders, and for Operators to ask for Train Orders.
31 or 19—for Train Order, as provided in the rules.
The usual abbreviations for the names of the months and stations.
Rules 526 and 527 prescribe the mode of designating trains and the use of figures, signs, and abbreviations, with option as to figures, in a note under Rule 526. Uniformity in these matters is important for clearness of understanding and economy and expedition in telegraphing.
It is a question how far abbreviations may properly be used in train telegraphing. They certainly should be admitted only when they can be shown not to interfere with a safe understanding of orders. Initials for the signatures of Superintendent or Dispatcher and operators may be used, but they would hardly be admissible for the signatures of trainmen. The latter may very properly be addressed as "C. and E." The "O K" for "all right" is an established signal, not requiring a dictionary to interpret it.