Midnight Engineering is a magazine that was published by William E. "Bill" Gates (not to be confused with William Henry Gates III, the founder of Microsoft), from approximately 1991 to 2001 (need exact dates). The target audience is primarily hardware and software engineers running their own small businesses or holding "day jobs" and "burning the midnight oil" developing products or services to allow them to become independent entrepreneurs.
There is still a conference associated with readers of the magazine, initially called ME SKI in 1992, renamed to ENTCON (Entrepreneurs Conference) shortly thereafter, and transformed into EntConnect in 2003. It is still held early each Spring in Denver, Colorado, and attended most years by the magazine's founder, Bill Gates.
Although the magazine is no longer published, a loyal group of the magazine's readers continues to meet each year in Colorado, at the end of March, for Entrepreneurial Connections. EntConnect for short. The next conference is scheduled for March 21-24, 2013. Details can be found via the EntConnect link below.