Looking up contacts and other information
With the
•Lookup: Enables you to dial your contacts by name. It locates people’s phone numbers when you’re in the Phone or Messaging applications.
•Find: Searches through the text in all the applications on your Treo.
Looking up contacts
You can look up contacts directly from the Contacts list. This feature helps you locate contacts quickly by entering just a few letters of a contact’s name.
1.Press the Phone/Send 
button.
2.Select the Contacts favorite button.
3.From the Contacts list, enter the first few letters of the contact you want to find. You can enter:
•First name (JOH for John) or
•Last name (SMI for Smith) or
•First name initial and last name (JSM for John Smith)
If entering the first few letters doesn’t start a search, go to Applications and select Contacts, and then try step 2 again. To set your Treo to search from the Main View of the Phone application, go to that view, open the Options menu, and select General Preferences. Then select the second pick list and select Typing starts contacts search.
To look up contacts in other applications, select the Lookup button if it appears.