HP 3000 Manual page 86

Explanation of Specifications.
Header Specification.
Column 6 The H identifies this as the Header line.
Cols 7-12 SORTA identifies this as an Address-out sort.
Cols 13-17 10 is the largest sum of all control field lengths. It is derived generally from adding all control
fields designated with an F, N, or 0 in column 7 for each record type. This case is an exception
because a forced control field is being used. It will overlay the position in the work record
occupied by the character it is forcing and, therefore, will not contribute to the total control
field length.
Column 18 The A indicates that the sorted records will be in ascending order by control fields.
Record Type Specifications.
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