The "digital revolution" pervades current headlines as "c-business" transforms commercial practices and reshapes major industries. But the wellsprings of today's digital technologies surfaced more than a half century ago, stimulating successive waves of change that repeatedly threatened the survival of well established firms in home entertainment, electronic components, communications services, data processing, and related fields. Even the most dominant firms in the information industries have found themselves challenged to develop new strategies and new capabilities to cope with the incursions of new rivals exploiting new technologies. The academic literature on innovation has repeatedly observed that mature, successful firms often fail to adapt successfully to revolutionary changes in technology (Cooper and Schendel, 1976; Foster, 1986; Christensen, 1997). Rather than analyzing patterns of failure, however, this paper traces the means by which one prominent firm--National Cash Register Company (NCR)--coped with radical changes in technology over four decades. We will examine in detail how NCR addressed the introduction of electronics to the field of business equipment and the advent of digital computers to widespread use. NCR not only survived but eventually prospered in the face of these powerful forces of change. Through this account of NCR's history from 1938 to 1978, we hope to illuminate the processes by which other firms threatened by similar fundamental change might cope successfully with the emergent threats. [ABSTRACT FROM AUTHOR]