What is Backus Naur form used for?

Related questions

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5. What is regular grammar in automata?
6. What is context free grammar in automata?
7. What is the difference between CFG and regular grammar?
8. Is BNF app free?
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1. #concise
2. #describe
3. #languages
4. #backus
5. #fortran
6. #usually
7. #simple
8. #introduced
9. #programming
10. #language
11. #bakus
12. #1950s
13. #purpose
14. #manner
15. #grammar
16. #designer