calling other servlets inside a servlet...

[Pedro Salazar]

Greetings,

how can I call another servlet inside a servlet? And I would like to 
have two options: one is that the servlet called is the final servlet, 
and the other option is calling a servlet just to get a result 
(outputstream) o the main servlet and continue processing the main servlet.
This is just a servlet question specification or it depends if I'm 
working on tomcat or other product?

thanks,
Pedro Salazar.