- 17 June 1946 – The first telephone call using the Mobile Telephone Service, a precursor to the cellular phone, is made in St. Louis, Missouri
- 20 June 2003 – The Wikimedia Foundation (logo pictured), the non-profit that operates Wikipedia and its sister projects, is founded in St. Petersburg, Florida
- 28 June 1972 – Atari, a pioneer in arcade games, home video game consoles, and home computers, is founded as Atari, Inc.
- 28 June 2006 – The Series of tubes speech is delivered by then- United States Senator Ted Stevens to describe the Internet and defend the Senator's opposition to network neutrality