[en] Annual report of Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, Pakistan for the year 2010-11 has been compiled which describe a concise but comprehensive description of R and D activities conducted during this period. PINSTECH has contributed considerably in the discipline of chemical, engineering, environmental and physical sciences. It has always been extending technical help and services to Pakistan Atomic Energy Commission (PAEC) as well as other organizations. There are about 90 publications in summary form which gives the main theme of the research activities. At the end of this report different institute activities like courses organized, collaboration with universities, internship, honours /awards and list of publications during the year is also presented. (A.B.)