Abstract: A polycarbonate diol composition contains: a polycarbonate diol containing a structural unit (1) derived from a compound (1) represented by the following general formula (1); HO—(CH2)n—OH (1) (n is an integer of 3 to 6) and an aldehyde having 3 or more and 8 or less carbon atoms. A method for producing a polycarbonate diol composition, includes: polycondensing a carbonate compound and a dihydroxy compound composition containing a compound (1) represented by the following general formula (1) and an aldehyde having 3 or more and 8 or less carbon atoms by a transesterification reaction in the presence of a catalyst, to obtain a polycarbonate diol composition containing a polycarbonate diol. A polyurethane is obtained by using this polycarbonate diol composition.

Abstract: An information processing device includes a display control unit that displays an application window in a superimposed manner on an application screen so that a user is allowed to visually recognize at least part of the application screen in a display screen based on an operation by the user, wherein a display mode of the application window includes at least a first display mode and a second display mode that are different in a display aspect of the application window, and wherein the display control unit displays a first window having a fixed position and a fixed size as the application window in the first display mode, and displays a second window having a variable position and a variable size as the application window in the second display mode.

Abstract: Further improvement in usability is promoted. An information processing device (10) includes a control unit (140) that executes processing of displaying an operation area having a predetermined shape in an edge area of a display screen, and moving the operation area to a center area of the display screen by a first operation set in advance as a predetermined operation on the operation area.

Abstract: In a conventional multi-window function, when it is desired to switch an application to another application, only one application can be switched, which lacks usability. Therefore, provided is an information processing apparatus that includes an operation unit configured to detect an operation by a user, and a display unit configured to display a first application list and a second application list in response to detecting a first user operation, display a first application selected in a first window in response to detecting a second user operation for selecting the first application from the first application list, and display a second application selected in a second window in response to detecting a third user operation for selecting the second application from the second application list.