"Ezer Miyehuda" on Chumash Breishis, Pirkei Avos and more. Nickel-brass replaced bronze in 1967, including the last issue of 5 avos. In 1945, bronze 10 avos, nickel-bronze 20 avos and silver 50 avos coins were introduced. Among other lasting accomplishments, Bunim was known for his Perek-on-the-Lawn teachings of Pirkei Avos. He and Hurley started AVOS Systems which acquired Delicious from Yahoo! In May 2014, AVOS sold the site to Science Inc. In May 2014, AVOS sold Delicious to Science Inc. AVOS Systems was an Internet company founded by Chad Hurley, Steve Chen and Vijay Karunamurthy. In May 2011, AVOS purchased the social analytics company Tap 11. Dayan Fisher published "Ateres Mordechai", a commentary to Pirkei Avos in London in 1953. On November 9, 2011, AVOS Systems announced that they had acquired the link-saving service, Trunk.ly. In 1940, notes of 5, 10 and 50 avos were introduced. Two ships, Juno and Avos, under Russian Navy Ensign are leaving for California. In 2014 AVOS transformed from an incubator into a single company working only on MixBit.