English

Proper noun

IRS

1. (US): Initialism of Internal Revenue Service.

Noun

IRS ‎(uncountable)

1. (aviation) Initialism of inertial reference system.

Synonyms

(Inertial Reference System):

• INS (inertial navigation system)
• INU (inertial navigation unit)
• IRU (inertial reference unit)

See also

(Inertial Reference System):

• GPS (global positioning system)
• AHRS (attitude and heading reference system)

Initialism

IRS

1. (engineering) Initialism of Interface Requirements Specification.

Anagrams

• ISR, RSI, SIR, Sir, sir