ICL operating systems

ICL (International Computers Limited) was a British information technology company that was particularly influential in the 1960s through the early 1990s. ICL produced its own line of mainframe and mid-range computers and developed a number of operating systems to run on them. One of the notable operating systems developed by ICL was **ICL 2900 Series OS**, specifically designed for their 2900 series of computers, which included various models of mainframe computers.