---
title: "TYMNET"
type: "entity"
entity_kind: "concept"
status: "watching"
canonical_name: "TYMNET"
aliases: []
first_seen: "2026-07-22T00:00:00.000Z"
writer_model: "claude-sonnet-5"
---


Tymshare's packet-switched network, distinct from the SDS-940 timesharing operating system, entering the vault via Norman Hardy's "Origins of Tymnet" essay and Ann Hardy's own account of a later 940-host/network integration change she wrote. Watching for recurrence — LaRoy Tymes's design and the network's 1971 spin-off cutover are both named further leads in the source capture, not yet independently read.

## References
- [[claim-norman-hardy-tymnet-account-confirms-ann-hardy-wrote-os]]