These keep the old system of letter code plus numbers.

However, such letter codes were not used in all countries.

For clothes where a larger step size is sufficient, the standard also defines a letter code.

The three categories of events have a letter code in front of them.

The letter codes were eliminated, and the number of varieties within each plan was greatly increased.

Components from many stations are defined by three letter codes.

Neither appears to have been recoded to four letter codes.

Input the three letter code for the currency used in the Value field.

The language is formed from a series of two letter codes, followed by optional parameters.

The geographical distribution is indicated by a series of two letter codes.