Feinler began working at SRI's Network Information Center as ARPANET, the precursor to the modern internet, began to grow.
By 1969, Elizabeth Feinler was working for SRI International at the Network Information Center (NIC), precisely as the ARPANET — the U.S. Department of Defense-funded network that would become the technical and conceptual ancestor of the modern internet — began its historic expansion beyond its first four nodes.
1969 is a landmark year in computing history: it was the year the first ARPANET message was transmitted between UCLA and SRI. Feinler's presence at SRI during this foundational period placed her at the epicenter of a technological revolution. The NIC's role was to serve as a central clearinghouse of information about the network — who was connected, what resources were available, and how the growing community of researchers could find and use them.
This early involvement set the stage for Feinler's later, more formalized leadership role. As ARPANET grew from a handful of nodes to dozens and eventually hundreds of connected institutions, the need for organized documentation, naming conventions, and directories became increasingly urgent — a need Feinler would spend the next two decades addressing.
Though no precise month and day are documented for this specific milestone, 1969 stands as a critical inflection point both for Feinler's career and for the technological history of networked computing, as the seeds of the modern internet were being planted at the very institution where she worked.