Linux is a stable, powerful OS -- a viable UNIX competitor to Windows in the PC platform arena -- and its technical value is driving economic successes of many kinds. Consider the recent, dramatic IPOs of Linux-focused companies such as Red Hat and VA Linux. More to the point, consider the enormous sales potential already demonstrated by books on Linux. One reason for this is that the growing numbers of new Linux users are largely unfamiliar with the UNIX world. For them especially, and for experienced users, too, the Linux Dictionary and Quick Reference is an indispensable, easily affordable investment, offering alphabetically organized definitions of more than 1000 Linux terms, plus convenient documentation of over 250 commands.