A premature announcement can cause others to respond with their own. When VisiCorp announced Visi On in November 1982, it promised to ship the product by spring 1983. The news forced Quarterdeck Office Systems to announce in April 1983 that its DESQ would ship in November 1983. Microsoft responded by announcing Windows 1.0 in fall 1983, and Ovation Technologies followed by announcing Ovation in November. "InfoWorld" noted in May 1984 that of the four products only Visi On had shipped, albeit more than a year late and with only two supported applications.