0000944209-00-000216 10-Q 2 19991231 20000214 OSI SYSTEMS INC 0001039065 3674 330238801 CA 0630 10-Q 34 000-23125 542375 12525 CHADRON AVE HAWTHORNE CA 90250 3109780516 12525 CHADRON AVENUE HAWTHORNE CA 90250 10-Q 1 000094420900000216-001-seq1-10-q.txt FOR THE QUARTERLY PERIOD ENDED DECEMBER 31, 1999 EX-27 2 000094420900000216-002-seq2-ex-27.txt FINANCIAL DATA SCHEDULE