Related Clues:

• Sets of regulations
• 'One if by land, two if by sea' and others
• Cryptography topic
• Regulations for builders
• Sets of rules or cryptograms
• Word systems devised to create secrecy
• It may be hard to decipher how to be firm with a boy
• Poems by the hundred need to be deciphered
• Works on a program
• Man following company rules
• Morse and others
• Programs
• Does some computer programming
• Symbolic systems the end for Pindaric works?
• Programmes ('Morse' is one of them)