By the end of 1988, a DOS version 1.0 of the Integrated Land and Water Information System (ILWIS) was released. Two years later, ILWIS was made commercial with ITC establishing a worldwide distributors network.
By the final months of 1988, the first version of the Integrated Land and Water Information System (ILWIS) for DOS was available. Two years after that, ILWIS was launched as a commercial product, with ITC creating an international system to supply it to customers.