Abbreviator n. : One who abbreviates or shortens.

Abbreviator n. : One of a college of seventy-two officers of the papal court whose duty is to make a short minute of a decision on a petition, or reply of the pope to a letter, and afterwards expand the minute into official form.

Example:
if it takes longer to decipher what people are saying in their abbreviations, is it really an abbreviation aft?

Taxonomy
Abbreviators, prelates, Abbreviator, privileges, college, chancery, presidency, labour, office, Pope, benefices, Parco, emoluments, apostolic letters, decrees, the Roman, duty, tax.

Defination from the web:
Abbreviator, plural Abbreviators in English or Abbreviatores in Latin, also called Breviators, were a body of writers in the papal chancery, ... Whatever may be the date of the institution of the office of abbreviator, it is certain that it became of greater importance and more highly ...