Linux and Active Directory

Does anyone know if there is a way to interface a Linux box with Micoshaft's
Active Directory Services?

Thank You,

David Demland
Qa/Testing Manager
CADTEL Systems, Inc.
11201 N. Tatum Ste. 200
Phoenix, AZ 85028
(602) 953-4888
Fax: (602) 953-4833
ddemland@cadtel.com