Abstract: A system for navigating among resources includes a target detection module detecting whether a first resource has been branched from to two other different resources and a backward navigation module operable to detect selection of a backward navigation button and cause navigation to the first resource. A method includes designating a target resource accessible via a backward navigation button in a first browser session, detecting selection of the backward navigation button in a second browser session, and navigating to the target resource in the second browser session. The method can involve detecting hovering of a pointer icon over the backward navigation button and responsively presenting a thumbnail of a resource associated with the backward navigation button.

Abstract: A method includes storing one or more resource identifiers identifying one or more associated resources visited using a browser application, and presenting the resource identifiers in an order designated by one of a plurality of history presentation settings and resource navigation context specifications. The history presentation setting and navigation context can be selected by a user. Exemplary history presentation settings include chronological and domain-name grouped. Exemplary navigation context includes resource identifier, such as name, URI, or domain of the currently viewed resource. The method may further include presenting a thumbnail when a pointer icon is positioned over one of the resource identifiers.

Abstract: A system for navigating among resources includes a target detection module detecting whether a first resource has been branched from to two other different resources and a backward navigation module operable to detect selection of a backward navigation button and cause navigation to the first resource. A method includes designating a target resource accessible via a backward navigation button in a first browser session, detecting selection of the backward navigation button in a second browser session, and navigating to the target resource in the second browser session. The method can involve detecting hovering of a pointer icon over the backward navigation button and responsively presenting a thumbnail of a resource associated with the backward navigation button.

Abstract: A system for navigating among resources includes a target detection module detecting whether a first resource has been branched from to two other different resources and a backward navigation module operable to detect selection of a backward navigation button and cause navigation to the first resource. A method includes designating a target resource accessible via a backward navigation button in a first browser session, detecting selection of the backward navigation button in a second browser session, and navigating to the target resource in the second browser session. The method can involve detecting hovering of a pointer icon over the backward navigation button and responsively presenting a thumbnail of a resource associated with the backward navigation button.

Abstract: A method of creating a user-defined function in a spreadsheet application is provided. The user-defined function is callable by a calling label in the spreadsheet application. A formula is received in the spreadsheet application. The formula is transferred to a function sheet of the spreadsheet application to define at least a portion of a function body. An interface is defined by identifying the calling label, an input parameter and a result parameter of the user-defined function. The function body operates on an argument corresponding to the input parameter and generates a result corresponding to the result parameter. The interface is stored in association with the function body to create the user-defined function.

Abstract: User-defined function capabilities in a spreadsheet application allow users to create new named functions that are defined using the spreadsheet formula paradigm. A user may define spreadsheet functions from formulae entered in a worksheet or function sheet of a spreadsheet application. The formula interface is well known to spreadsheet users; therefore, expanding the formula feature to provide encapsulated functions that can be imported, exported, customized, and compiled supplies new power and flexibility to users who do not wish to learn a programming language. Furthermore, the user-defined functions in spreadsheets represent vectors and matrices as “first class” values, similar to Boolean values, numbers, and strings.