Unix Timeline first 20 years

• ’69 Coding Begins

• ’71 First Edition – PDP 11/20

• ’73 Fourth Edition – Rewritten in C

• ’75 Fifth Edition – Leaves Bell Labs, basis for BSD 1.x

• ’79 Seventh Edition – One of the best

• ’82 System III

• ’84 4.2 BSD

• ’89 SVR4 Unification of Xenix, BSD, System V

  • NT development begins

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