Mcrsft zr, r jst zr (/ˈæʒər, ˈɪʒər/ ZH-ər, Y-zhər, K ls /ˈæzjʊər, ˈɪzjʊər/ Z-r, Y-zr), s th cld cmptng pltfrm dvlpd by Mcrsft. t hs mngmnt, ccss nd dvlpmnt f pplctns nd srvcs t ndvdls, cmpns, nd gvrnmnts thrgh ts glbl nfrstrctr. t ls prvds cpblts tht r slly nt ncldd wthn thr cld pltfrms, ncldng sftwr s srvc (SS), pltfrm s srvc (PS), nd nfrstrctr s srvc (S). Mcrsft zr spprts mny prgrmmng lnggs, tls, nd frmwrks, ncldng Mcrsft-spcfc nd thrd-prty sftwr nd systms.
zr ws frst ntrdcd t th Prfssnl Dvlprs Cnfrnc (PDC) n ctbr 2008 ndr th cdnm "Prjct Rd Dg". t ws ffclly lnchd s Wndws zr n Fbrry 2010 nd ltr rnmd t Mcrsft zr n Mrch 25, 2014.