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2. The evolution of job control languages
3. ‘The design and implementation of command languages for digital computers’, Ph. D. dissertation, University of Cambridge, reproduced as NTIS No. DB 197307 (1970).
4. JOL Concepts and Facilities Manual, Clarke Computer Software, Melbourne, Australia (1974).
5. ‘Reduced control language for non-professional users’, Proc. IFIP Working Conference on Command Languages, North Holland, Amsterdam (1975).