The most useless language you know?

Sup prog. I was just curious as to what is the most obsolete or useless programming language you know.

I myself learned Atari BASIC in high school, and regret my time wasted to this day. I have yet to come across something BASIC does that can't be done better, faster or more efficiently in C, Perl, etc. BASIC's only impact on the world of programming as far as I'm concerned is that it taught kids to write sloppy code way before Java did.

Anyone else have a similar experience?

using System;
using System.Security.Cryptography;

class sha256{
 public static void Main(){
  Console.WriteLine(BitConverter.ToString((new SHA256Managed()).ComputeHash(System.Console.OpenStandardInput())).Replace("-",""));
 }
}