[CentOS] [off-topic] Question about csh.

Hi

I received this request from a user and could not find the solution. I 
would like to know if someone already solved this:
"At the command prompt I used to be able to type the first letter of a 
line command and then by using the up arrow key, scroll through all of 
the line commands, that begin with that letter, that I had previously 
executed."

It's a machine with CentOS-5.3, x86_64, and tcsh-6.14-14.el5, but his 
shell is 'csh'.

Thanks

Marcelo