Hello,Ajinkya

ICRB stands for ISRO CENTRALISED RECRUITMENT BOARD(ICRB). The exams are conducted by ICRB for ANNUAL RECRUITMENT OF SCIENTIST/ENGINEER 'SC' WITH BE/B.TECH OR EQUIVALENT DEGREE IN ELECTRONICS, MECHANICAL AND COMPUTER SCIENCE

For more details visit the link provided below.

https://apps.isac.gov.in/CentralBE-2016/advt.jsp

Hope this helps.