<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">operating systems</topic></authority><related type="narrower"><topic>[operating systems by specific type]</topic></related><related type="broader"><topic>software</topic></related><variant type="other"><topic>OS</topic></variant><variant type="other"><topic>computer operating systems</topic></variant><variant type="other"><topic>disk operating systems</topic></variant><variant type="other"><topic>operating system</topic></variant><variant type="other"><topic>operating system software</topic></variant><variant type="other"><topic>operating systems, computer</topic></variant><variant type="other"><topic>operating systems, disk</topic></variant><variant type="other"><topic>software, operating system</topic></variant><variant type="other"><topic>systems, computer operating</topic></variant><variant type="other"><topic>systems, disk operating</topic></variant><variant type="other"><topic>systems, operating</topic></variant> <note xml:lang="en"><![CDATA[ The collection of software that directs a computer's operations, controlling and scheduling the execution of other programs, and managing storage, input/output, and communication resources. ]]></note></mads>