Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

Each of the below listed subsidiaries is 100% directly owned by CSP Inc. except as otherwise indicated, and all are included in the consolidated financial statements.

NAME OF SUBSIDIARY		STATE OR OTHER JURISDICTION OF INCORPORATION/ ORGANIZATION
CSP Securities Corp. 175 Cabot Street, Suite 210 Lowell, MA 01854		Massachusetts

CSP Inc. Foreign Sales Corp., Ltd. 175 Cabot Street, Suite 210 Lowell, MA 01854		U.S. Virgin Islands

Modcomp, Inc (1). 1182 East Newport Center Drive Deerfield Beach, FL 33442		Delaware

ARIA Cybersecurity Inc. 175 Cabot Street, Suite 210 Lowell, MA 01854		Delaware

(1)	Modcomp has one subsidiary operating in Europe