Hacker News on 3 May 2021

• Back in 1993, I was taking a number theory class
• The Unix Magic Poster
• Dave Herman’s contributions to Rust
• Amazon knew seller data was used to boost company sales
• Practical SQL for Data Analysis
• Don't make customers hunt for the Sign In button on your website
• What3Words sends legal threat to security researcher for sharing an alternative
• Stack on a Budget – A collection of services with free tiers
• The End of AMP
• Bill and Melinda Gates Separated