Early user interfaces were designed with little or no consideration for the end user. This was largely due to technical and hardware limitations. The poor interface design required a specific skill set for users and limited the mass appeal of computers. Modern interfaces are much more user friendly. Theo Mandel wrote about the five (5) golden rules of interface design. Read Mandel’s article located athttp://www.theomandel.com/docs/Mandel-GoldenRules.pdf.