Answer:
Technical writing is the art of being able to explain/describe complex ideas to both technical and nontechnical audiences usually in the form of a Manual or online Help.
This kind of writing could range from describing a complex procedure to maintaining a specific type of military apparatus, to explaining how to assemble a baby's playpen to a consumer.
In all cases, the style of technical writing must be succinct; accurate, comprehensive and easy to understand and follow. Personalization such as humor should not be included in technical writing.