What is perp in Kraken?

Excuse me, could you please clarify what you mean by "perp" in the context of Kraken? Is it a specific term or abbreviation used in the world of cryptocurrency trading or finance on the Kraken platform? I'm not immediately familiar with that term in relation to Kraken specifically, but it could be referring to a particular feature, service, or product offered by the platform. Could you provide some additional context or explain what you're looking to understand about "perp" in Kraken?