Groucho's comment seems even more pertinent when applied to today's technology.
Usability is critical to the success of computer systems and products.
Too many systems exist which are difficult to learn, complicated to operate, and are often under-used or misused. The outcome is costly for the organisation which purchased the system, and harmful to the reputation of the company which developed it. A good computer system has what is called 'Quality in Use'. Systems and products with high quality in their use are the most effective means of advertising the potential of your company. We welcome your feedback.