ʻO YaCy (i ʻōlelo ʻia "ya see") he ʻenekini huli manuahi, i kūkulu ʻia ma luna o nā loina o nā pūnaewele peer-to-peer (P2P). ʻO kāna kumu he polokalamu kamepiula i kākau ʻia ma Java i hoʻolaha ʻia ma nā haneli kamepiula, mai Kepakemapa 2006, i kapa ʻia ʻo YaCy-peers. Kolo kūʻokoʻa kēlā me kēia YaCy-peer ma ka Pūnaewele, kānana a me nā papa kuhikuhi i loaʻa i nā ʻaoʻao pūnaewele, a mālama i nā hopena kuhikuhi i loko o kahi waihona maʻamau (i kapa ʻia ʻo index) i kaʻana like me nā YaCy-peers e hoʻohana ana i nā loina o nā pūnaewele P2P. He ʻenekini ʻimi manuahi ʻole ia e hiki ai i nā mea a pau ke hoʻohana i ke kūkulu ʻana i kahi puka huli no kā lākou intranet a kōkua i ka ʻimi pono ʻana i ka pūnaewele lehulehu.