How to save typing in IE5

This may be obvious, but I have not been able to find it….
Which setting makes it so that when I begin typing in a URL, and IE5 finds a match, that I can hit enter and it selects the top match and goes there. Netscape did this automatically.
For example: if I want to go to www.cisco.com and I type “www.ci” and cisco was the only site beginning with “www.ci” in the history file, then I could hit enter without further intervention and be taken to the Cisco site.
Matt