Acronym for heaps of things, without context you can't guess if it's from an Organization of Health Service Providers, from the Ontario Provincial Standard Specification, from the Public Subscription Offerings (with a final "s" by the plural), of a mecanism or machine safety christened Operator Presence Sensing System, if it is simply an exclamation of astonishment, if
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
