Furthermore, the same as in the Slovak case above holds for lowercase t and d, and for the two-digit year notation. Source: Internet
At least six numberings are in use: citation citation The semiconductor package date code is often a 4 digit date code YYWW where the first two digits YY are the last 2 digits of the calendar year and the last two digits WW are the two-digit week number. Source: Internet
In the US Highway system, three-digit numbers are assigned to spurs of one or two-digit routes. Source: Internet
Mile markers and exit numbers On one- or two-digit Interstates, the mile marker numbering almost always begins at the southern or western state line. Source: Internet
Freeways Three two-digit Interstate highways serve Cleveland directly. Source: Internet
Moreover, the apostrophe is also used before a two-digit year number (to indicate the omission of the first two digits): ' 87 (usually used for 1987). Source: Internet