Oulu is the capital of the province of Oulu and the region of Northern Ostrobothnia. It is the sixth largest (fourth largest if you exclude Espoo and Vantaa which are not actually cities but suburbs of Helsinki) city in Finland, and the largest and most important in Northern Finland. Oulu is known for its high-tech nature, with free wireless internet access, Panoulu
http://www.panoulu.net/index.shtml.en, in the city center. A lot of Finnish IT companies, including Nokia, have offices in Oulu or nearby areas. http://wikitravel.org/en/Oulu