EPI,ARS,ITO能分别详细介绍一下吗?

问缩写的时候最好指明领域；
下面是我给你的一些解释：

EPI - Economic Policy Institute
EPI is a nonprofit, nonpartisan think tank that seeks to broaden the public debate about strategies to achieve a prosperous and fair economy.

ARS - Agricultural Research Service 农业调研服务

ITO - IT outsourcing
IT外包服务