question on character-like variable defination

Hi, all,

in Fortran77, normally a variable to store a string can be defined as:
character file
-------------------------------------------------------
But how to interpret the following defination:

character*30 files,fileid,prname,nmname,nmriname,inhnam,fidnam,
# mgc1t1,mgc2t1,mgc1p1,mgc2p1,mgc1g1,mgc2g1
character flags*5,tfile*80,cmt*74
-------------------------------------------------------
what does it mean by "character*30" and "character flags*5"

Thanks!

Jing

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