4 posters · 1969 to 2026
Reference sheets
Reference sheets to hang by a desk: the ASCII table, the HTTP status codes, the SI base units, the phonetic alphabet and Morse code.
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Reference sheets
ASCII: USA Standard Code for Information Interchange
Vint Cerf, 1969
The 128 codes of 7-bit ASCII with their decimal and hexadecimal values and names, as RFC 20 gives them.
Print from A3
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Reference sheets
The SI Base Units
Bureau International des Poids et Mesures, 2019
The seven defining constants of the SI and the definitions of its seven base units, from the SI Brochure.
Print from A3
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Reference sheets
HTTP Status Codes
Roy T. Fielding and 3 others, 2022
Every status code of the IANA HTTP registry with its reason phrase, and the definitions of RFC 9110.
Print from A2
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Reference sheets
Phonetic Alphabet and Morse Code
Federal Aviation Administration, 2026
The ICAO phonetic alphabet with the Morse code of each letter and figure, from the FAA’s Aeronautical Information Manual.
Print from A3
