5 Things You Might Not Know About Facebook''s Mark Zuckerberg: The IPO|Wedding And More The founder of one of the most popular companies of the past 50 years was fascinated with computers and inventing programs at an early age. This helped make him one of the most well-known people in the world. Here is a look at five things you might not know about Facebook - now Meta Platforms Inc (NASDAQ: FB )- co-founder and CEO Mark Zuckerberg . 1. Early Inventions: At the age of 12, Zuckerberg created a messaging program he named “Zucknet.” The program was created on an Atari BASIC. Zuckerberg’s father used the program in his dental office so the receptionist could inform him of new patients arriving without having to yell across the room. The Zuckerberg family also used the messaging system at home. In high school, Zuckerberg created an early version of music software similar to Pandora , the music streaming platform now owned by Sirius XM Holdings Inc (NASDAQ: SIRI ). The music platform was called Synapse. Microsoft Corporation (NASDAQ: MSFT ) and AOL were both turned down by Zuckerberg to acquire Synapse .