The shell script uiolook calls the Fortran program uiolok.f90. The man-page:
UIOLOOK(1V) Misc. Reference Manual Pages UIOLOOK(1V)
NAME
uiolook - print entry headers of file in uio form
SYNOPSIS
uiolook [ -h ] [ -p ] [ filename ... ]
AVAILABILITY
DESCRIPTION
The routine uiolook reads each filename (file in uio form)
in sequence and displays the headers of the entries in
pretty form.
OPTIONS
-h Print usage of uiolook.
-p Entry header keywords in (long) pretty form
SunOS 5.5.1 Last change: 27 November 1996 1