make+notches+in
21Enigma machine — Military Enigma machine …
22passeriform — /pas euhr euh fawrm , peuh ser euh /, adj. of or pertaining to the order Passeriformes; passerine. [ < NL Passeriformes, equiv. to L passer sparrow + iformes IFORMES] * * * ▪ bird Introduction also called passerine or perching bird any… …
23printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …
24Compact Cassette — A TDK D C60 cassette, a common speech quality tape with a 60 minute playing time, in a housing similar to that of the original Compact Cassette specification …
25writing — /ruy ting/, n. 1. the act of a person or thing that writes. 2. written form: to commit one s thoughts to writing. 3. that which is written; characters or matter written with a pen or the like: His writing is illegible. 4. such characters or… …
26Britney Spears — Britney redirects here. For other uses, see Britney (disambiguation). Britney Spears Spears …
27Beyoncé Knowles — Beyoncé Knowles …
28Dream Within a Dream Tour — Dream Within a Dream Tour …
29Log cabin — For other uses, see Log cabin (disambiguation). Log cabins in the open air Norwegian Museum of Cultural History in Bygdøy, Oslo …
30Cryptanalysis of the Enigma — enabled the western Allies in World War II to read substantial amounts of secret Morse coded radio communications of the Axis powers that had been enciphered using Enigma machines. This yielded military intelligence which, along with that from… …
