/sys$common/syshlp/helplib.hlb FORTRAN, Format Specifiers, T  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Tn (Tab to Position n)

  On input, starts the next read operation at the character position
  (within the record) indicated by position(n).  For example, if an
  input statement reads a record containing:

     ABC   XYZ

  and this record is under the control of the FORMAT statement:

     10 FORMAT (T7,A3,T1,A3)

  On execution, the input statement would first read the characters
  XYZ and then read the characters ABC.

  On output, starts the next write operation at the character
  position n in the external record.

  The position specified must be an integer in the range 1 through
  the size of the record.