Short horizons Because memory capacity was extremely expensive in the 1960s, many software engineers routinely used a single digit for the year. The number 5, for example, meant 1965. Then everyone had to get busy and change these dates when 1970 rolled around.
在六○年代記憶體極其昂貴的時候，不少工程師慣用一個欄位來代表年份，譬如用「五」代表一九六五年，結果要進入七○年代時，大家才紛紛修正改寫。