Sample Code
...........\Concurrent Application
...........\......................\client.c
...........\......................\makefile.txt
...........\......................\server.c
...........\include
...........\.......\fd.h
...........\.......\inform.h
...........\.......\line_by_line.h
...........\.......\mail-helper.h
...........\.......\mess.h
...........\.......\monitor.h
...........\.......\protocol.h
...........\.......\sock.h
...........\lib
...........\...\inform.c
...........\...\line_by_line.c
...........\...\mail-helper.c
...........\...\mess.c
...........\...\monitor.c
...........\...\protocol.c
...........\...\sock.c
...........\Simple Client-Server
...........\....................\simple-client.c
...........\....................\simple-server.c
...........\Simple Mail Client
...........\..................\mail-client.c
...........\..................\mail-one-line.c