For travels:

Travel Checklist
http://www.stonybrook.edu/procurement/employees/travel/checklist.shtml

Travel Forms
http://www.stonybrook.edu/procurement/employees/travel/travel_forms.shtml

For purchases:

Requisition forms and instructions
http://www.asa.stonybrook.edu/asa/asaforms/Department/PROC/Document/PROC0065