Professional
desktop publishing (DTP) application produced by Quark. It is the most widely used professional DTP application. Since debuting in 1987, QuarkXPress has been the leading layout and design software for publishers worldwide.
Quark uses a hardware key to prevent copying, plugged into one of the computer's universal serial bus (USB) ports (though earlier versions used the Apple serial port or PC parallel printer port). It is available on both the Macintosh and Windows PC platforms.
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