[Networker] Licensing Q - workstation licenses?

I'm confused about this output from "nsrlic -v":

      WORKSTATION CLIENT TYPES
                           DOS: 0
                     Macintosh: 0
                          OS/2: 0
                  Windows 3.1x: 0
                    Windows 95: 0
        Windows NT Workstation: 1
                       UX/4800: 0
                        Others: 0

               Defined Clients: abbtfil001, admin_nt8rc,
                                admin_nt9, admndev012, ecssql1,
                                mjrsfil001, mjrsfil002,
                                nt_san1, oldlotusmail, psfile1,
                                psfile3, pssql1, pssql2,
                                pssql3, pssql4, san2,
                                ~admin_nt8rc.wrk.ads.pha.phila.gov-1,
                                ~nt_san1-1;

What are "workstation" licenses? And why are these particular clients 
using this type of license, rather than a normal client license? A few of 
these are cluster resource clients (not the cluster nodes), but not all.


-- 
Michael Leone
Network Administrator, ISM
Philadelphia Housing Authority
2500 Jackson St
Philadelphia, PA 19145
Tel:  215-684-4180
Cell: 215-252-0143
<mailto:michael.leone AT pha.phila DOT gov>

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER