NorthStar, in the context of the computer industry, refers to the North Star Horizon, a pioneering personal computer introduced in the late 1970s by North Star Computers Inc., based in California, USA. Designed by Mark Greenberg and others, it was notable for its integrated floppy disk system, offering a significant leap in data storage and retrieval over cassette tapes. The Horizon was aimed at both the business and educational markets, providing a robust platform for software development, data processing, and computing education, marking a significant milestone in PC history.