System Usability Scale

Wikipedia
* Brooke, J. (1996) SUS: a "quick and dirty" usability scale. In P. W. Jordan, B. Thomas, B. A. Weerdmeester & A. L. McClelland (eds.) Usability Evaluation in Industry. London: Taylor and Francis.
Amazon

SUS - A quick and dirty usability scale (DOC)

SUS – A quick and dirty usability scale (PDF)