Many concepts for future computer systems were presented in the 1960s and 1970s, but none really touched office work as much as the Memex or had such a lasting impact. For instance, the Dynabook idea (presented by Alan Kay and the Xerox PARC) proposed a portable slate-like personal computer which could have been used in an office but which was really an extremely personal exploration tool, meant more to draw art, compose music or invent new algorithms than to write a business letter.[3]