text items ?

hi,

I want to know

1.what is a text item?

2. is it a manual or a text always accompanying the main item ?

3.why do we not maintain a material master to it ?

4.some people say it is like manuals accompanying TV,AC etc...then what is the difference between TEXT items and FREE of charge delivery (FD) as those are also relevant for delivery not relevant for billing ?

5. Any buisness and SAp scenario for that ?

regards

sriram.