Word (computer program)

An application was installed on Petronella Osgood's computer by 10 May 2020. Its logo was a blue square with a gradient, and a smaller blue square over it, just to the side, with a white "W" featured over it. (WC: The Zygon Isolation)

Behind the scenes
While the application was not named in WC: The Zygon Isolation, the application was named "Word", or "Microsoft Word", in the real world, and was created by Microsoft.