We live in countries where you need a license to cut hair, but you don’t need anything to write code for safety critical software or other mission critical software.

— Adam Barr, The Problem with Software

multiply 111,111,111 by itself, you get the rather pleasing 12,345,678,987,654,321

— Matt Parker, Things to Make and Do in the Fourth Dimension

The lesson here is that the narrower you can make your product while still maintaining a large enough market, the more profit you will generate. It’s that simple – if you can find a small group of people and make them amazingly happy, you will make money.

— Rob Walling and Mike Taber, Start Small, Stay Small

French mathematician Edouard Lucas (1842–1891) did actually prove that every even perfect number must end with 16, 28, 36, 56, 76, or 96

— Haim Shapira, Eight Lessons on Infinity

For me, technical direction is a reminder to care daily about my work. Growth is actively watching my career and making sure that today is not a dull repetition of yesterday. Finally, delivery is my daily investment in my reputation.

— Michael Lopp, Being Geek