An apparatus and method for testing the condition of computer peripherals is provided. The apparatus is portable and enclosed in a housing and comprises a microprocessor, first nonvolatile memory means having stored therein an operating system routine, at least one working memory means for storing an...http://www.google.co.uk/patents/US4837764?utm_source=gb-gplus-sharePatent US4837764 - Programmable apparatus and method for testing computer peripherals
