 In March 1989 Calmos acquired UltraMac Conversions which designed and manufactured peripherals for Apple's Macintosh computers, which subsequently operated under the name Calmos Data, the group was headed by the former president Lincoln Henthorn.By May Calmos Microsystems had grown to 55 employees, was profitable and had sales of over $4.5 million.Newbridge Networks, a Calmos customer and founded by Welsh entrepreneur Terry Matthews, who had also attended university with founder John Roberts, acquired the company.