Earle Spaulding of Temple University in a 1939 paper on disinfection of surgical instruments in a chemical solution proposed "a strategy for sterilization or disinfection of inanimate objects and surfaces
The three categories are critical, semicritical, or noncritical for spaulding classification. The system also established three levels of germicidal activity for disinfection (high, intermediate, and low). Hope this helps and please give brainliest!
