difference between delay and reverb.

[mikeshead]

I understand that the difference between delay and reverb is just a question of the fed back echo times. But does anyone know how to apply each and what is the different effect each has on the sound?

At the moment (though ignorance) I tend to apply reverb to acoustic guitar (with no delay) and delay with a little reverb to vocals.

It would be interesting to know also how delay and reverb affect each other.

Currently (on my br900) I tend to add most of the delay on each primary track and then add a little reverb once I have bounced the tracks down and they are ready to be mastered.

Good idea or not ?

Cheers
mikeshead