---
title: "Harold Stone"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Harold Stone"
aliases: ["Harold S. Stone","Prof. Harold Stone"]
first_seen: "2026-08-11T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["K-C-S draft","IEEE 754","William Kahan"]
seek_code_commit: "b13747c"
---


Harold Stone was a visiting professor at UC Berkeley in the late 1970s and, with William Kahan and Kahan's student Jerome Coonen, co-author of the "K-C-S" draft specification that the IEEE p754 committee adopted as the working basis of the IEEE 754 floating-point standard.

Stone is the "S" in K-C-S — the third named author of the document this vault's floating-point-standards lineage runs through, and otherwise unattested in the vault so far.

## References

- [[claim-kahan-8087-spec-became-ieee-754]] — the K-C-S draft and its adoption.