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.
OS stands for Operating System. A computer's operating system is the foundation software that lets everything happen on the computer. Windows, OS X, and Linux are the most common operating systems for computers. iOS is Apple's operating system for mobile devices (iPhone, iPad). The i is just Apple's standard branding emblem. iPhone, iPod, iPad, iOS.