What is the x in of Technical Writing?

Technical writing can be categorized using four aspects commonly known as the "4 x's" of technical writing:

1) Task: The task x represents what the user needs to accomplish and what content should focus on.

2) Tools: The tools x denotes the medium/software the product is made in, such as a web page or user manual.

3) Users: The users x indicates who the reader/audience is for the written product, such as employees or customers.

4) Contexts: The contexts x outlines the conditions people would use the written product in, like a workplace or customer service situation.