Momma, Don't Let Your Babies be Tech Writers
http://www.absolutewrite.com/specialty_writing/be_tech_writers.htm

Wormald, Karen
Absolute Write
2001

Abstract:

If you have the stomach for it, technical writing can be the path to a full-time writing career. I did it for three years before switching to general business writing, which offers more variety. If you decide to go technical, be sure to keep reading the work of authors you admire so your day job doesn't make you forget everything you ever knew about 'real' writing.