That’s the classic first response a programmer will get a new program to issue as a test to confirm the installation works – usually it prints to the screen. According to Wikipedia the first use of the “Hello World” response dates back to 1972. I didn’t get into computers until 10 years later when a computer arrived at the company I was working for. The stock reports produced by the computer were very badly laid out and I taught myself to re-program the software. The IBM pc had two 5.25 inch disks, a green screen and a dot matric printer and cost 2,000 GBP.