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Timeline; 1973

The C programming language was used this year to rewrite the 1969 code for Unix, freeing it from the pdp7 and giving it it's famed portability.

Ken Thompson and Dennis Richie present the first Unix paper at the Symposium on Operating Systems Principles at Purdue University.

Professor Bob Fabry of the University of California at Berkeley expressed interest in getting a copy to experiment with.

After the initial wave of 6 members in 1952, the European Union allows 3 more to join, Denmark, Ireland, and the United Kingdom. A further expansion occurs in 1981.

There were also some books and movies created this year.