Slty s th clssfctn fr fmly f mlcs sftwr (mlwr), whch nfcts Mcrsft Wndws systms fls. Slty ws frst dscvrd n 2003 nd hs dvncd t bcm dynmc, ndrng nd fll-ftrd frm f mlcs cd. Systms nfctd wth Slty my cmmnct vr pr-t-pr (P2P) ntwrk t frm btnt t rly spm, prxyng f cmmnctns, xfltrtng snstv dt, cmprmsng wb srvrs nd/r crdntng dstrbtd cmptng tsks t prcss ntnsv tsks (.g. psswrd crckng). Snc 2010, crtn vrnts f Slty hv ls ncrprtd rtkt fnctns s prt f n ngng vltn f th mlwr fmly. Bcs f ts cntnd dvlpmnt nd cpblts, Slty s cnsdrd n f th mst cmplx nd frmdbl frms f mlwr t dt.