Documents / FOIA release
This unclassified article by H. Campaigne, published in the NSA Technical Journal, Vol. XIV, No. 1, gives a key to a series of 31 hypothetical radio messages from outer space that Campaigne had presented earlier. Step by step it decodes symbols for numbers, arithmetic, logic, set theory, octal notation, the rational and real numbers, limits, and finally the periodic table of the elements. The article concludes that any civilization able to send messages across space would share basic concepts of number, sets and physical constants.
Read from the scan by GLM-OCR; expect the odd misread word.
## APPENDIX Recently a series of radio messages was heard coming from outer space. The transmission was not continuous, but cut by pauses into pieces which could be taken as units, for they were repeated over and over again. The pauses show here as punctuation. The various combinations have been represented by letters of the alphabet, so that the messages can, be written down. Each message except the first is given here only once. The serial number of the message has been supplied for each reference. 1 ABCDEF GHIJKLMNOPQRSTUV ABCDEF GHIJKLMNOPQRSTUV ABCDEF GHIJKLMNOPQR etc 3 LAA. LBB. LCC. LDD. LEE. LFF. LGG 4 LBKAA. LCKBA. LCKAB. LDKCA. LDKBB. LDKAC; LEKDA. LEKCB. LEKBC. LEKAD. LFKEA. LFKDB. LFKCC. LFKBD. LFKAE. 5 LFKAKBC LFKCKBA, LGKAKBD, LGKCKAC, LKAKBCKKABC 6 LAMBA. LBMCA. LAMCB. LCMDA. LBMDB. LAMDC. LDMEA. LCMEB. LBMEC. LAMED 7 LNMAA. LNMBB. LNMCG. LNMDD. LNMEE. LNMFF. LNMCG H LAOAA. LNONA. LBOAB. LBOBA. LNONB. LNOBN. LDOBB. LDOAD. LFOAF. LFOBC 9 LFOA0BC. LFCOBA. LFBOBUCA; LODOEF0ODEF 10 LDRBB LDRBA. LARBN. LCRCA. LARCN 11 LRBCKDD, LRBCKAG, LRBCOBD, LRBBD 12 LRCRKDE. LRCBOCC 1. 3 LIKRC. LIKAG. LKJAOCC. LKJARCB 14 LBPJD. LDPJB. LAPCC. LCPFB 15 UAB, UBC; UCD; UEJ; UFJ; UGJ; URBCRB. 16 QLNA: QLAC; QLAKAA; QLNOAA; QLRBBB; QUBB; QHLAALAB; QQLCC: QUJG. 17 SLAA; SUAB; SLBKAA; SLAOAA; SLNMAA; SHLF0AFLAPFF; SHLAALBB 18 LATA, LBTKATA; LETKBTCT; LFTOCTBT; LGTG; LANTJ. 19 LABCTKOARJBKOBRJAC; LCBATKOCRJBKOBRJAOARJN; LDEFGTKKODRJCDERJBKOFRJAOGRJN; 20 HLIKAAVILGAV. SLQAVTVOPVAV. HLAATHLAVLBAV. SLKAVKPVTVNKAVPVTV. HLCAVLAATHAVB SLQAVOPVSVOAVPVSV. HLKAVLPKAAV HQLAVBVQLNAVBVNBVAV. HLKAGOVLHCOV. HQLAVBVQLRAVBVRBVAV HLFORSOVLCSOV 21 HLNKMNDDDVBOEQDVCUVLADKDVLBLDDV HLCTDVLAATHDOVB HUVLADVLMINADVLAROVB SLKAVFKPVAV HUVLABVLMBVLMBVRBV.
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FOIA release, from the nsa collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 11 pages are in the text index: search them above, or from the library's search.