One of the most interesting businesses to join the FTSE 250 in a long time is Raspberry Pi (LSE:RPI). Raspberry Pi's mission statementAs a quick refresh, Cambridge-based Raspberry Pi makes cheap credit card-sized computers that are popular with millions of hobbyists, students, and teachers of computer science. The Raspberry Pi 5 was released in late 2023. Last year, Raspberry Pi hit an inflection point, as it sold more semiconductors (microcontrollers) than computer boards for the first time. While still quite a small business today, semiconductors are rapidly becoming a bigger slice of the overall pie.