Where will D sit in the web service space?

[via Digitalmars-d]

On Sunday, 12 July 2015 at 20:36:26 UTC, Etienne Cimom wrote:
> backend being a natively compiled service in the computer. With 
> a 2 megabytes packed PE that is. It may not seem useful, but to 
> me it's revolutionary.

What is "PE"?