callbk             Callsign database files
callbk/gifs        Digital qsl images
devel              QRZ Developers Resources / Source Code
docs               Walnut Creek documentation
modfiles           Radio modification files
unix               Unix versions of QRZ
unix/aix           QRZ for the AIX operating system
unix/hpux          QRZ for the HPUX operating system
unix/irix          QRZ for the IRIX (SGI) operating system
unix/linux         QRZ for the LINUX operating system
unix/next          QRZ for the NEXT operating system
unix/os2           QRZ for the OS2 operating system
unix/sco           QRZ for the SCO operating system
unix/src           Sample Unix source code
unix/sun           QRZ for the SunOS/Solaris operating system