© 1986 by British Computer Society
IBM makes usability as important as functionality*

HUSAT Research Centre, University of Technology, Loughborough, Leicestershire LE11 3TU, UK
Functionality has for many years been the overriding criterion in the computer industry; in no small measure this has been due to the influence of IBM. Since 1981 a major change of policy at IBM has become evident, but is still little known. This short historical note presents the evidence and describes how IBM no longer gives supreme importance to functionality but now gives equal importance to usability.
Received December 1985.
* Nothing in this paper is based on confidential information; all is published or from open discussions.
HUSAT Research Centre, University of Technology, Loughborough, Leicestershire LE11 3TU