Technical writers, technical communicators, information specialists, desktop publishers—the job titles are many—occupy a small but important part of the technical, government, and business world. They may rarely have all the expert technical knowledge—in fact, rarely do—but they excel at communication, at handling information, at document design, at meeting readers' needs.
It is an excellent career path for people with liberal-arts degrees, especially those who have had difficulties getting employment that draws upon the capabilities they developed in college. But it is also a popular choice for technical people who have good communications skills but need a change of scenery.
For more on this career, see these links and references.