> Halons were banned in 1994, before datacenters became commonplace. The article is talking about 1971, long before Halon was banned. It was commonplace to fi

> Halons were banned in 1994, before datacenters became commonplace. The article is talking about 1971, long before Halon was banned. It was commonplace to find Halon installations in computer rooms in the 1980s.