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.
Often abbreviated as OS, an operating system is a powerful, and usually large, program that controls and manages the hardware and other software on a computer. All computers and computer-like devices have operating systems, including your laptop, tablet, desktop, smartphone, smartwatch, router... you name it.