Printer manufacturer QMS Inc, Mobile, Alabama, has agreement in principle to acquire privately-held Imagen Corp, which develops image processing technology and print systems in Santa Clara, California. The price has been set at 1.85m QMS shares, valuing Imagen at about $17.1m. QMS expects the transaction to be completed in early May. Imagen will take QMS right to the top end of the desk-top laser printer market: the company is particularly strong in integration of its products into Unix and DEC VMS environments where QMS is primarily in the MS-DOS and VMS world. No financial details of Imagen were supplied.