Final answer:
OSHA fat/cat reports are filed by employers to report workplace fatalities and serious injuries to OSHA.
Step-by-step explanation:
OSHA fat/cat reports refer to reports filed by employers to OSHA regarding workplace fatalities and serious injuries. OSHA requires employers to report incidents such as workplace fatalities, inpatient hospitalizations, amputations, and loss of an eye within specific time frames. These reports help OSHA monitor workplace safety and assess the effectiveness of their regulations.