The latest CASS requirements from the US Postal Service includes an optional abbreviation table (USABREV.tbl) that is used to return the USPS acceptable 13-character city name and the USPS acceptable 30-character deliverable address. The attributes populated are us_gout_postal_city_name_abrev and us_gout_delivery_address_abrev.
To specify Abbreviation option
In the US Postal Matcher Options window, select the Include Abbreviation
Tables check box.