three forms of technical writing used in the corporate environment.Then I need to explain why each form of communication is important.

Answer 1

Users manuals

Personnel procedures (hiring, etc.)

You decide on another.

http://www.google.com/search?q=technical+writing&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

Answer 2

I found many forms of technical writing used in the corporate environment. Check these sites out to see which forms match your text materials.

http://www.io.com/~hcexres/textbook/

http://bizntech.rutgers.edu/

http://owl.english.purdue.edu/internet/resources/genre.html#bus