$Logic (every field of study has a foundation of logical truth...logic also dictates that every field of study is intertwined with one another and logically connected together like a giant jigsaw puzzle)

NS1.DNS.COM
NS2.DNS.COM

NS1.DNS.NET
NS2.DNS.NET 

NS1.DNS.ORG
NS2.DNS.ORG 

NS1.DNS.IO
NS2.DNS.IO