Technical writers mainly work for economic sectors, like machinery or software development where basic knowledge about engineering and computer science is needed to develop information products. Often, they design information about technology for professional target groups, such as engineers. They must also communicate often with professionals from engineering disciplines or computer science. For this, technical writers should have a general understanding, should know about the technology, and understand its functioning.
The disciplines focus on the basics of those industry sectors where technical writers are likely to work later.
Technical writers need to have basic knowledge in some of the most relevant engineering disciplines, they should be able to understand the basics of natural science, and they should also know the basics of computer science.