What is the difference between evolutionary computation and evolutionary algorithms? A book on evolutionary computation by De Jong mentions both the term evolutionary algorithms (EA) as well as evolutionary computation (EC). However, it remains unclear to me what the difference between the two is. According to Vikhar, EA forms a subset of EC. However, it remains unclear to me what sort of topics/algorithms would be considered EC but not EA. Is there a clear difference between the two? If so, what is this difference?
As you can find here:


  Evolutionary algorithms form a subset of evolutionary computation in that they generally only involve techniques implementing mechanisms inspired by biological evolution such as reproduction, mutation, recombination, natural selection, and survival of the fittest.


It means, other types of evolutions, which are not necessarily a biological evolution, are in EC, but not in EA. For example, Learning classifier system is in EC as it is evolutionary, but not completely in EA as it is not biological.