0000944209-00-000561 4 1 20000322 20000411 OSI SYSTEMS INC 0001039065 3674 330238801 CA 0630 4 34 000-23125 598862 12525 CHADRON AVE HAWTHORNE CA 90250 3109780516 12525 CHADRON AVENUE HAWTHORNE CA 90250 CHOPRA DEEPAK 0001047058 DIRECTOR 4 C/O OSI SYSTEMS INC 12525 CHADRON AVE HAWTHORNE CA 70250 12525 CHADRON AVE HAWTHORNE CA 90250 CHAMBERLAIN SALLY F ECHOPRA DEEPAK 19970930 4 1 000094420900000561-001-seq1-4.txt FORM 4