CSIR may refer to:
;Organizations:
* Council for Scientific and Industrial Research, an earlier name for the
Commonwealth Scientific and Industrial Research Organisation, Australia
*
Council for Scientific and Industrial Research – Ghana
The Council for Scientific and Industrial Research (CSIR) was established by NLC Decree 293 of October 10, 1968 amended by NLCD 329 of 1969, and re-established in its present form by CSIR Act 521 on November 26, 1996. The genesis of the council ho ...
*
Council for Scientific and Industrial Research
The Council for Scientific and Industrial Research (CSIR) is South Africa's central and premier scientific research and development organisation. It was established by an act of parliament in 1945 and is situated on its own campus in the cit ...
, South Africa
*
Council of Scientific and Industrial Research
The Council of Scientific and Industrial Research (IAST: ''vaigyanik tathā audyogik anusandhāna pariṣada''), abbreviated as CSIR, was established by the Government of India in September 1942 as an autonomous body that has emerged as the l ...
, India
*
Italian Expeditionary Corps in Russia, or ''Corpo di Spedizione Italiano in Russia''
;Technology:
*
Channel state information In wireless communications, channel state information (CSI) is the known channel properties of a communication link. This information describes how a signal propagates from the transmitter to the receiver and represents the combined effect of, for ...
at the receiver
;Medicine:
* Cross-sectional
Interventional radiology
Interventional radiology (IR) is a medical specialty that performs various minimally-invasive procedures using medical imaging guidance, such as x-ray fluoroscopy, computed tomography, magnetic resonance imaging, or ultrasound. IR performs bo ...
{{Disambiguation