1.  Contents: related to science and technology            

2.  Readers: all types, most often “learners” 

3.      Writers: scientists or technicians, science or technical writers,  journalists

4.      Language:  various levels of technical difficulty; sometimes “jargon”

    5.  Style: detailed, descriptive, direct and clear, explanatory, objective

    6.  Format: professional look, use of visuals