Abstract: A web browsing system for retrieving a web page whereby the web page comprises associated frames, content data and context data (e.g. navigational buttons, hyperlinks to other web pages etc.). The system is usable with a distributed data processing system comprising a server computer and a client computer, whereby the web page is stored on the server computer and is transmitted over a network to the client computer. The web browsing system comprises a function for providing a bookmark to the web page and also comprises a function to retrieve the bookmark. Once a bookmark has been retrieved, the web page and the structure of the web page, namely, the plurality of frames, the content data and the context data are displayed.

Abstract: A web browsing system for retrieving a web page whereby the web page comprises associated frames, content data and context data (e.g. navigational buttons, hyperlinks to other web pages etc.). The system is usable with a distributed data processing system comprising a server computer and a client computer, whereby the web page is stored on the server computer and is transmitted over a network to the client computer. The web browsing system comprises a function for providing a bookmark to the web page and also comprises a function to retrieve the bookmark. Once a bookmark has been retrieved, the web page and the structure of the web page, namely, the plurality of frames, the content data and the context data are displayed.

Abstract: A program authorization mechanism for authorizing access to an address space in the main memory of a computer system by a program being run under a multiple address space facility. An access-list entry is associated with each address space, each access-list entry being designated by an access-list-entry token contained in an access register. Each access-list entry includes a private indicator which indicates if the associated address space can be accessed by all programs from this access-list entry or if the associated address space can only be accessed by an authorized program. For program to be authorized, an extended authorization index in a control register must match an access-list extended authorization index in the access-list entry, or the extended authorization index value must be authorized in an authority table associated with the address space. An instruction for testing a given extended authorization index for a given access-list-entry is also disclosed.

Abstract: The embodiment enables multiple virtual data domains to be accessible to a program executing on a processor. A data domain is a set of virtual address spaces for containing data that can be accessed by an executing program. Two types of data domains are defined by access lists, called PSAL and DUAL. Each list has entries specifying virtual address spaces accessible to an executing program. The program is located in a program address space. The program address space and each data domain are located through respective control registers. On a program call, the processor loads a control register with means to identify the PSAL data domain. The loaded control register provides the called program with immediate access to its own PSAL data domain. When the call is from a different program address space, the calling program space's PSAL data domain immediately becomes non-accessible due to overlaying in the single loading of the one control register.