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"Learn about cryptocurrency (decentralized cash systems) and blockchain (the encryption to protect transactions). They are only a decade old, but are quickly becoming a key part of the future of finance"--
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"Cryptology is the art and science of secret communication, and its purpose is to protect precious information and keep people safe. Learn about its building blocks: ciphers, codes, and keys"--
Data encryption (Computer science) --- Computer networks --- Computer crimes --- Security measures --- Cryptography --- Ciphers
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"Steganography is the art of concealing messages in plain sight. Read about invisible inks, the Cardano Grille, the use of microdots in WWI, and the butterfly maps of Lord Baden-Powell"--
Cryptography --- Ciphers --- History
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"Read about the historical code makers and breakers who protected their countries by coding and decoding messages for their governments, and the modern cryptologists who keep emails, texts, and online purchases secure"--
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This title examines the efforts of healthcare workers during the COVID-19 pandemic such as working with an unknown pathogen, PPE and equipment shortages, having to quarantine away from family, and Post Traumatic Stress Disorder.--
COVID-19 (Disease) --- Medical personnel --- Physicians --- Nurses --- Volunteers
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2000-2099 --- United States --- United States. --- Race relations
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"If you could build a castle, what kind would it be? A military fortress? A fairy castle? A home for royalty? Explore Make a Castle Your way! to imagine your own castle. Learn how to get inspired, problem-solve, and collaborate with other books in the SUPER SIMPLE DIY series to make your own spaceship, dinosaur, and more!"--Back cover.
Castles --- Handicraft --- Castles --- Castles in art --- Creative activities and seat work --- Models
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Item contains chapters from books, poems and extracts from literature as well as plates of work by the artist.
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