TechWhirl (TECHWR-L) is a resource for technical writing and technical communications professionals of all experience levels and in all industries to share their experiences and acquire information.
For two decades, technical communicators have turned to TechWhirl to ask and answer questions about the always-changing world of technical communications, such as tools, skills, career paths, methodologies, and emerging industries. The TechWhirl Archives and magazine, created for, by and about technical writers, offer a wealth of knowledge to everyone with an interest in any aspect of technical communications.
You should grasp the opportunity to expand into this world of technical
specifications that I have found fascinating. Afterall, you've been doing
some of this already and just didn't realize it. I'm sure you've gathered
requirements for your Help in order to meet the user's needs.
There's a few resources you won't want to be without:
Ben Kovitz: Practical Software Requirements: A Manual of Content and Style.
Karl Wiegers: Software Requirements by Microsoft Press.
I'm sure the archives at the techwhirl site list many additional resources
and helpful advice.