Hi
There are these three files that I guess are somewhat related. os2nosv4.zip, pmnos11x.zip, pmnos1dx.zip. Those are ports of KA9Q NOS, according to wikipedia "KA9Q, also called KA9Q NOS or simply NOS, was a popular early implementation of TCP/IP and associated protocols for amateur packet radio systems and smaller personal computers connected via serial lines."
I have no idea exactly how it works. Is it a full TCP/IP implementation, or is only for serial communication? What about the amateur packet radio systems part?
I still don't get what the software does.
Regards