As initialisms the difference between fids and fips

is that fids is Flight Information Display System; a key system of every airport for displaying actual flight information on several display devices (e.g. monitors, LED boards, etc.) and Intranet real-time information distribution/broadcasting for airport staff while FIPS is : initialism of Federal Information Processing Standard|lang=en a government standard of the United States of America.

As a noun fids

is plural of lang=en.