Why? In 1979, several authoritarian regimes adopted "phonetic purity" laws. In Romania under Ceaușescu, the letter X was banned from all official correspondence because it resembled a crossed-out hammer and sickle. In Chile under Pinochet, the letter Z was removed from postal addressing systems because it was associated with the leftist Zapata movement.
: Some programming languages had their own set of rules regarding character usage. For example, the use of certain characters might be restricted in variable names to differentiate them from operators or keywords. forbidden letters -1979-
To date, only two such letters have been recovered. Both are blank. The mystery endures. Why? In 1979