<Page> Exhibit 21.1 EVANS & SUTHERLAND COMPUTER CORPORATION SUBSIDIARIES OF THE REGISTRANT <Table> <Caption> State or Other Jurisdiction of Incorporation or Names Under Which Subsidiary Name Organization Each Subsidiary Does Business - ----------------------------------------------- ------------------ --------------------------------------------- Evans & Sutherland Graphics Corporation Utah Evans & Sutherland Graphics Corporation Xionix Simulation, Inc. Georgia Xionix Simulation, Inc. Evans & Sutherland Computer Limited United Kingdom Evans & Sutherland Computer Limited E&S Foreign Sales Corporation Virgin Islands E&S Foreign Sales Corporation E&S Partners, Inc. Utah E&S Partners, Inc. REALimage, Inc. Delaware REALimage, Inc. </Table>