OPEN statement assumption

[David Feller <dfeller@xxxxxxx>]

I'm a new user of the g77 compiler and I came across the following
question in porting a legacy code.  What is the assumed units when
specifying the record length in an OPEN statement?  For example,
in the following statement:

         OPEN(UNIT=40,
      *        ACCESS='DIRECT',RECL=NREC,STATUS='UNKNOWN',FILE=UNIX40)

what units are assumed for variable NREC?  Some Fortrans assume bytes, 
some
assume 4-byte words, etc.

I couldn't find this information on-line, but perhaps I wasn't looking 
in the
right place.

Thanks.

David Feller