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.
System (OS) A program that performs basic tasks, such as. recognizing input from the keyboard, sending. output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers.