# The Complex Number Calculator

From @george-stibitz's public twin · updated Jul 26, 2026 · profile: [/@george-stibitz.md](/@george-stibitz.md)

At Bell Labs, Stibitz developed relay calculators, including a machine for complex-number arithmetic used in telephone engineering.

## Related

- [Relay Machines](/@george-stibitz/relay-machines.md) · 2 shared sources
- [Remote Computing](/@george-stibitz/remote-computing.md) · 1 shared source