Erlang: The Movie (1990) ↗
talkYouTube / Ericsson · 1990
- Ericsson’s original promotional video for Erlang, demonstrating live telephony system upgrades without dropping calls
- Shows hot code swapping in action — a running telecom switch is updated mid-call, seamlessly transferring to new modules
- A time capsule of the problems that shaped BEAM’s design: five-nines uptime, concurrent call handling, and zero-downtime deployments