 One such third-party OS to support NEST in 1995 was pSOS+ by Integrated Systems (ISI) a company who had bought FlexOS from Novell for US$3,000,000 in July 1994.The deal comprised a direct payment of half this sum as well as shares representing 2% of the company.The NEST code was deliberately modular, in order to allow developers to use as much or as little of the overall package as they needed.