Input (grade 12): The TeX system, developed by Donald E. Knuth at the end of 70s, is another widespread and powerful automated typesetting system that has set high standards, especially for typesetting mathematics.
Output (grade 12): The TeX system, developed by Donald E. Knuth at the end of the 1970s, is another widespread and powerful automated typesetting system which has set high standards, especially for typesetting mathematics.