The most common and most likely answer to this crossword clue is the 3 letter word PPS which also is the latest solution we found used in New York Times in 1959.
Addendum: Abbr crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| PPS | 100 % | 3 | 
Words with a meaning similar to the clue: Addendum: Abbr
These words may or may not be a possible solution to this crosswords clue.- ese
 - add
 - amex
 - apt
 - dec
 - esq
 - est
 - eta
 - etd
 - irs
 - jan
 - msg
 
Crossword Answer definitions
PPS noun- One hundredth of a given value, used to measure the difference of two percentages.
 
- Proton and proton (used attributively to describe a collision or other interaction of these two particles)
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution