Wildcard
Definition:

A wildcard is used as a variable for unknown characters.  FPDS generally uses a trailing wildcard when doing a search.  It automatically inserts a wildcard at the end of whatever you typed.

Example:  If you type OFFICE in the name field of the Vendor Selection screen and then click the Search button, you may get something like this:

OFFICERS EQUIPMENT COMPANY
OFFICE SERVICE COMPANY
OFFICE FURNITURE LIQUIDATORS

Use the percent sign (%) when you want to insert a wildcard.  

Example:  If you type %OFFICE in the name field of the Vendor Selection screen and then click the Search button, you may get something like this:

BOISE CASCADE OFFICE PRODUCTS
SIERRA OFFICE SYSTEMS