Abstract: Disclosed are a photoacid generator, a photoresist composition including the same, and a method of preparing the photoacid generator. The photoacid generator may include a compound represented by Formula 1: wherein, in Formula 1, CY, A1, A2, and B are respectively described in the specification.

Abstract: A synchronous multi-user display wall system for displaying multimedia contents provided by a plurality of computing devices each interacting with the display wall system at the discretion of a user. The synchronous display wall system includes one or more single or tiled-display wall and one or more servers operatively coupled to the display walls and to the plurality of computing devices. The system is configured to enable each of the users to concurrently display information on the display wall, as well as to enable concurrent interaction by each of the users with the displayed information. The system is configured further to enable synchronization of content displaying on the display wall with other display wall system that are connected over the same network. A method for multiple users to concurrently interact with shared media that is displayed, and a multiuser interactive display system that can synchronize with other display systems is described.