Today technical writing encompasses all documentation of complex technical processes. It includes reports, executive summary statements, briefs. Any time technical information is conveyed in writing at work, it is, by definition, technical writing.

This can include high-tech manufacturing, engineering, biotech, energy, aerospace, finance, IT, and global supply chain.

The format is no longer bound to lengthy user manuals. Technical information must be distilled and presented unambiguously. This can come in the form of technical reports, emails, policy, briefs, and press releases.

The bottom line is if you work in a technical field you are most likely performing technical writing.