Table:
text: Sovereign wealth fund
Largest sovereign wealth funds
Largest sovereign wealth funds
Country Abbreviation Assets_US_Billion Inception Origin
Trinidad & Tobago HSF 5 2000 Oil
United States of America Alabama ATF 2.5 1985 Oil & Gas
Italy ISF 1.4 2011 Non-commodity
United States of America North Dakota NDLF 1.3 2011 Oil & Gas
United Arab Emirates Ra`s al Khaymah RIA 1.2 2005 Credits obtained via RAK Government
United States of America Louisiana LEQTF 1.1 1986 Oil & Gas
Nigeria NSIA 1 2011 Oil
Palestine PIF 0.8 2003 Non-commodity
Venezuela FEM 0.8 1998 Oil
Kiribati RERF 0.6 1956 Phosphates
Vietnam SCIC 0.5 2006 Non-commodity
Gabon GSWF 0.4 1998 Oil
Indonesia GIU 0.3 2006 Non-commodity
Mauritania NFHR 0.3 2006 Oil & Gas
Australia WAFF 0.3 2012 Minerals

Question: What is the origin for the country abbreviated atf under Sovereign Wealth Fund?