HP Rp3440-4 - 9000 - 0 MB RAM Programmer's Manual page 16

BSD Sockets Concepts
many layers of networking protocols. This is accomplished by using a set
of system calls. These system calls allow you to create communication
endpoints called sockets and transfer data between them.
BSD Sockets is a program development tool. Before you attempt to use
NOTE
BSD Sockets, you may need to familiarize yourself with the C
programming language and the HP-UX operating system. You could
implement a BSD Sockets application using FORTRAN or Pascal, but all
library calls and include files are implemented in C.
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