Search for: Title Author Subject Series Call number that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # Machine ciphers 3 SEE ALSO: Enigma cipher system 8 SEE ALSO narrower term: Lorenz cipher system 2 Machine data storage and retrieval -- SEE: Information storage and retrieval systems 22 Machine design 9 Machine design -- Amateurs' manuals. 1 Machine design -- Amateurs' manuals -- Juvenile literature. 1 Machine design -- Competitions. 1 Machine design -- Handbooks, manuals, etc. 1 Machine design -- History. 2 Machine design -- Juvenile literature. 5 Machine design -- Popular works. 1 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >