Diagnosis Code for Reimbursement Claim: ICD-9-CM 879.8. Code will be replaced by October 2015 and relabeled as ICD-10-CM 879.8. The Short Description Is: Open wound site NOS.
operating system. noun. Definition of operating system for Students. : a program or series of programs that controls the operation of a computer and directs the processing of the user's programs.
The operating system (OS) is the underlying software that manages your deviceâs processes, hardware, software and memory. The apps you download use the operating system to tell your device what function to perform. The most popular mobile OSs are Android and iOS.