1z10 is the common Polish abbreviation for Jeden z Dziesięciu, the long-running television quiz adapted from the British format Fifteen to One and broadcast in Poland since 1994. In the show, contestants compete to be the one who answers, so the zgłoszenie, the act of registering to respond, is a familiar and tense part of every round. The half-second signal has since moved onto Polish soundboards and social edits, where it is reused far beyond quizzes whenever someone wants to volunteer, interrupt or claim the floor first.