Otto. (spelled with the period) is Finland's interbank network, connecting the ATMs of nearly every bank in the country. It is owned and operated by Automatia. They offer service in Finnish and Swedish, but also in English to holders of international ATM cards. The word "Otto" means "withdrawal" in Finnish, and is also a relatively common given name.
Some of the particularities of Otto. are that there are no bank-specific ATMs in Finland. Every ATM only bears the Otto. logo, plus the other interbank networks, which include MasterCard, VISA, American Express and their affiliated brands. Also, there are two separate slots. The blue one is for chip cards, whereas the yellow one is for non-chip cards that only have a magnetic stripe.