| arpa/inet.h | Internet address conversion |
| cfg/coconut.h | Coconut hardware specification |
| cfg/ethernut.h | Ethernut hardware specification |
| cfg/medianut.h | Medianut hardware specification |
| cfg/modem.h | RS232 handshake hardware specification |
| dev/ahdlc.h | Asynchronous HDLC device definitions |
| dev/debug.h | Debug device definitions |
| dev/irqreg.h | Interrupt management definitions |
| dev/irsony.h | Sony remote control device definitions |
| dev/lanc111.h | Network interface controller definitions |
| dev/netbuf.h | Network buffer definitions |
| dev/nicrtl.h | Network interface controller definitions |
| dev/ppp.h | PPP device definitions |
| dev/spidigio.h | Digital Port SPI Definitions |
| dev/spiflash.h | SPI flash definitions |
| dev/term.h | Terminal device definitions |
| dev/uartavr.h | AVR on-chip UART definitions |
| dev/uartspi.h | SPI UART definitions |
| dev/vs1001k.h | Network interface controller definitions |
| fs/uromfs.h | Micro-ROM file system definitions |
| net/errno.h | Network error definitions |
| net/ether.h | Ethernet protocol definitions |
| net/if_arp.h | ARP protocol header |
| net/if_types.h | Network interface type definitions |
| net/if_var.h | Network interface structure |
| net/ppp.h | PPP protocol definitions |
| net/route.h | Routing information definitions |
| netinet/icmp.h | ICMP protocol definitions |
| netinet/if_ether.h | Ethernet interface definitions |
| netinet/if_ppp.h | PPP interface definitions |
| netinet/in.h | Internet definitions |
| netinet/ip.h | Definitions for internet protocol version 4 |
| netinet/ip_icmp.h | Interface control message protocol definitions |
| netinet/ipcsum.h | IP checksum definitions |
| netinet/ppp_fsm.h | PPP state machine definitions |
| netinet/sostream.h | Socket stream device definitions |
| netinet/tcp.h | TCP protocol definitions |
| netinet/tcp_fsm.h | TCP state machine definitions |
| netinet/tcputil.h | TCP utility function prototypes |
| netinet/udp.h | UDP protocol definitions |
| pro/dhcp.h | DHCP protocol definitions |
| pro/httpd.h | HTTP protocol definitions for daemons |
| sys/bankmem.h | Banked memory management definitions |
| sys/config.h | Hardware configuration |
| sys/confnet.h | Nut/Net configuration |
| sys/confos.h | Nut/OS configuration |
| sys/device.h | Nut/OS device definitions |
| sys/event.h | Event management definitions |
| sys/heap.h | Heap management definitions |
| sys/ifstran.h | Stream device interface definitions |
| sys/ifstream.h | Stream device interface definitions |
| sys/ir.h | Remote control definitions |
| sys/print.h | Formatted printing definitions |
| sys/sock_var.h | UDP and TCP socket interface definitions |
| sys/socket.h | UDP and TCP socket interface definitions |
| sys/thread.h | Thread management definitions |
| sys/timer.h | Timer management definitions |
| sys/types.h | Nut/OS type declarations |
| sys/uart.h | UART I/O function prototypes |