DECnet
DECnet is a proprietary network protocol suite developed by Digital Equipment Corporation (DEC) for communication between computers, primarily used in DEC's VMS and TOPS operating systems. It provides services for file transfer, remote access, and distributed computing across DEC hardware, such as PDP and VAX systems. Although largely obsolete today, it was influential in early networking and influenced later protocols like OSI.
Developers should learn DECnet primarily for historical context or when maintaining legacy systems in industries like manufacturing, finance, or government that still use DEC hardware. It's useful for understanding early network architectures and for interoperability in environments where older DEC equipment is integrated with modern systems. Knowledge of DECnet can aid in migration projects or troubleshooting in niche legacy setups.