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close this bookNew Training Technologies (ILO - UNEVOC, 1995, 95 p.)
close this folderAppendix A Compatibility
View the document(introduction...)
View the documentPC buses (architecture)
View the documentMicroprocessors
View the documentOperating systems
View the documentGraphic modes
View the documentDigital images, sound and video files
View the documentColour standards
View the documentVideotape formats

Operating systems

All PC functions are controlled by an operating system (OS); applications are written to run under a specific OS; it is therefore important to know what is necessary to run a specific PC and a specific application:

· the DOS (Disk Operating System) is the oldest OS; it works on small equipment; its different versions followed the market trends and technological improvements (e.g. bigger memory management, etc.).

· WINDOWS is not really an OS in itself; it is a powerful graphic interface for DOS users, which makes their work much more friendly. It helps to manage extended memory; to integrate various applications, exchanging files via its clipboard. Different versions exist, as well as multimedia extensions;

· OS/2 is a multitasking and multiusers IBM OS which means that the user can execute different programs simultaneously (e.g. printing a file while working on another one, or formatting a diskette while updating a data base or a spreadsheet). It allows DOS and WINDOWS applications to be run under its control; different versions are available, as well as multimedia extensions;

· APPLE System 7 runs on the Apple series of computers;

· UNIX is a multiusers, multitasking operating system, mainly used on workstations. More powerful than usual PCs; multimedia capabilities have been added to the software.22

22 Multimedia premies on UBIX workstations - David SIMPSON - Systems Integration -January 1992.