Early announcements send signals not only to customers and the media, but also to providers of support products, regulatory agencies, financial analysts, investors, and other parties. For example, an early announcement can relay information to vendors, letting them know to prepare marketing and shelf space. It can signal third-party developers to begin work on their own products, and it can be used to persuade a company's investors that they are actively developing new, profitable ideas. When IBM announced its Professional Workstation computer in 1986, they noted the lack of third-party programs written for it at the time, signaling those developers to start preparing. Microsoft usually announces information about its operating systems early because third-party developers are dependent on that information to develop their own products.