0001193125-05-192252 SC TO-C 2 20050927 20050927 SPACELABS HEALTHCARE, INC. OSI SYSTEMS INC 0001039065 3674 330238801 CA 0630 SC TO-C 34 005-53245 051105564 12525 CHADRON AVE HAWTHORNE CA 90250 3109780516 12525 CHADRON AVENUE HAWTHORNE CA 90250 OSI SYSTEMS INC 0001039065 3674 330238801 CA 0630 SC TO-C 12525 CHADRON AVE HAWTHORNE CA 90250 3109780516 12525 CHADRON AVENUE HAWTHORNE CA 90250 SC TO-C 1 dsctoc.htm SCHEDULE TO EX-99.1 2 dex991.htm LETTER TO CERTAIN EMPLOYEES ISSUED ON SEPTEMBER 27, 2005