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In this chapter we will consider two very simple but useful Web agents that I have written on Actor Prolog for my own needs. ... Let us start the Web agent. Fig. ... Start of the Web agent. The Context diagram consists of three blocks: "Logic Programming Sites", "Edit", and "Check". ... Some Web sites that are linked with the logic programming and Prolog are listed in the pulldown list (these addresses are transferred to the "Edit" block from the "Logic Programming Sites" block). ...

... Older browser versions had the nice feature that MIME types (related to the extensions .esh and .ash) and the corresponding actions could be managed directly by the user. For security reasons, this has been disabled for newer browser generations, including the firefox installed on the muc blades. ... 2.1 Heritage accounts and profiles . ... Search for the string 'wrapper': all profiles with a mimeTypes.rdf file containing 'wrapper' are heritage profiles, and you can use them for your browser. ...

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

... Help pages are formatted and converted automatically to HTML for presentation in the GUI (or on the WWW), or to Postscript for hardcopy output. ... XHelp is a GUI browser for the IRAF help system which uses existing help facilities in IRAF to locate documents, but provides a familiar web-browser interface. ... Easy access to auxiliary help documents such as package ``system documents'' and task source code, . ... Extensions to LROFF to support HTML style document links within IRAF help pages. ...