system v derivatives continued to be deployed on some proprietary server platforms. the principal variants of system v that remain in commercial use are aix (ibm), solaris (oracle), and hp-ux (hp). according to a study done by idc, in 2012 the worldwide unix market was divided between ibm (56%), oracle (19.2%), and hp (18.6%). no other commercial unix vendor had more than 2% of the market. industry analysts generally characterize proprietary unix as having entered a period of slow but permanent decline.