The Cogar 4 became the Singer 1500 after Singer Business Machines acquired Cogar Corporation and then in 1976 ICL acquired Singer Business Machines then changing the name of the computer to the ICL 1500.
The Cogar 4 became the Singer 1500. Singer Business Machines acquired Cogar Corporation. ICL acquired Singer Business Machines. This was in 1976. These Singer Business Machines were then changing the name of the computer to the ICL 1500.