Nuclear Power Plants Software License Why Do All Software Licenses Expressly Exempt Nuclear Power Plants?

Why do all software licenses expressly exempt nuclear power plants? - nuclear power plants software license

It seems that all software licenses that are specifically exempted from nuclear plants. There is a precedent, or just scared? Nuclear power plants to the software? Does anyone use the software to ensure that its nuclear program?

This limit is one of many that the use of software.
http://java.sun.com/j2se/1.5.0/jdk-1_5_0 ...

Only a strange curiosity.